Donald Campbell Explained

Donald Malcolm Campbell
Birth Name:Donald Malcolm Campbell
Birth Date:1921 3, df=y
Birth Place:Kingston upon Thames, Surrey, England
Death Place:Coniston Water, Lancashire, England
Death Cause:High-speed crash during water speed record attempt
Body Discovered:28 May 2001
Resting Place:Parish Cemetery, Hawkshead Old Road, Coniston
Nationality:British
Other Names:"The Skipper"
Known For:Most prolific water speed record breaker of all time
Awards:Segrave Trophy (1955)
Occupation:Speed record breaker
Spouse:
    Children:1
    Parents:Malcolm Campbell
    Dorothy Evelyn Whittall

    Donald Malcolm Campbell, (23 March 1921 – 4 January 1967) was a British speed record breaker who broke eight absolute world speed records on water and on land in the 1950s and 1960s.[1] He remains the only person to set both world land and water speed records in the same year (1964). He died during a water speed record attempt at Coniston Water in the Lake District, England.

    Family and personal life

    Donald Malcolm Campbell was born at Canbury House, Kingston upon Thames, Surrey,[2] [3] [4] the son of Malcolm, later Sir Malcolm Campbell, holder of 13 world speed records in the 1920s and 1930s in the Bluebird cars and boats, and his second wife, Dorothy Evelyn (née Whittall).[5]

    Campbell attended St Peter's School, Seaford in East Sussex, and Uppingham School in Rutland. At the outbreak of the Second World War he volunteered for the Royal Air Force, but was unable to serve because of a case of childhood rheumatic fever. He joined Briggs Motor Bodies Ltd in West Thurrock, where he became a maintenance engineer. Subsequently, he was a shareholder in a small engineering company called Kine Engineering, producing machine tools. Following his father's death on 31 December 1948 and aided by Malcolm's chief engineer, Leo Villa, the younger Campbell strove to set speed records first on water and then land.

    He married three times — to Daphne Harvey in 1945, producing daughter Georgina (Gina) Campbell, born on 19 September 1946; to Dorothy McKegg (1928–2008) in 1952; and to Tonia Bern (1928–2021) in December 1958, which union lasted until his death in 1967.[6] [7] Campbell was intensely superstitious, hating the colour green, the number thirteen and believing nothing good ever happened on a Friday. He also had some interest in the paranormal, which he nurtured as a member of the Ghost Club.[8]

    Water speed records

    Campbell began his speed record attempts in the summer of 1949, using his father's old boat, Blue Bird K4, which he renamed Bluebird K4. His initial attempts that summer were unsuccessful, although he did come close to raising his father's existing record. The team returned to Coniston Water, Lancashire in 1950 for further trials. While there, they heard that an American, Stanley Sayres, had raised the record from 141mph160mph, beyond K4's capabilities without substantial modification.

    In late 1950 and 1951, Bluebird K4 was modified to make it a "prop-rider" as opposed to her original immersed propeller configuration. This greatly reduced hydrodynamic drag: The third planing point would now be the propeller hub, meaning one of the two propeller blades was always out of the water at high speed. She now sported two cockpits, the second one being for Leo Villa.

    Bluebird K4 now had a chance of exceeding Sayres' record and also enjoyed success as a circuit racer, winning the Oltranza Cup in Italy in the spring of that year. Returning to Coniston in September, they finally got Bluebird up to 170 mph after further trials, only to suffer a structural failure at 170mph which wrecked the boat. Sayres raised the record the following year to 178mph in Slo-Mo-Shun IV.

    Along with Campbell, Britain had another potential contender for water speed record honours — John Cobb. He had commissioned the world's first purpose-built turbojet Hydroplane, Crusader, with a target speed of over 200mph, and began trials on Loch Ness in autumn 1952. Cobb was killed later that year, when Crusader broke up, during an attempt on the record. Campbell was devastated at Cobb's loss, but he resolved to build a new Bluebird boat to bring the water speed record back to Britain.

    In early 1953, Campbell began development of his own advanced all-metal jet-powered Bluebird K7 hydroplane to challenge the record, by now held by the American prop rider hydroplane Slo-Mo-Shun IV.[1] Designed by Ken and Lew Norris, the K7 was a steel-framed, aluminium-bodied, three-point hydroplane with a Metropolitan-Vickers Beryl axial-flow turbojet engine, producing 3,500-pound-force (16 kN) of thrust.

    Like Slo-Mo-Shun, but unlike Cobb's tricycle Crusader, the three planing points were arranged with two forward, on outrigged sponsons and one aft, in a "pickle-fork" layout, prompting Bluebirds early comparison to a blue lobster. K7 was of very advanced design and construction, and its load bearing steel space frame ultra rigid and stressed to 25 g (exceeding contemporary military jet aircraft). It had a design speed of 250mph and remained the only successful jet-boat in the world until the late 1960s.

    The designation "K7" was derived from its Lloyd's unlimited rating registration. It was carried on a prominent white roundel on each sponson, underneath an infinity symbol. Bluebird K7 was the seventh boat registered at Lloyds in the "Unlimited" series.

    Campbell set seven world water speed records in K7 between July 1955 and December 1964. The first of these marks was set at Ullswater on 23 July 1955, where he achieved a speed of 202.32mph but only after many months of trials and a major redesign of Bluebirds forward sponson attachments points. Campbell achieved a steady series of subsequent speed-record increases with the boat during the rest of the decade, beginning with a mark of 216mph in 1955 on Lake Mead in Nevada. Subsequently, four new marks were registered on Coniston Water, where Campbell and Bluebird became an annual fixture in the latter half of the 1950s, enjoying significant sponsorship from the Mobil oil company and then subsequently BP.

    Campbell also made an attempt in the summer of 1957 at Canandaigua, New York, which failed due to lack of suitable calm water conditions. Bluebird K7 became a well known and popular attraction, and as well as her annual Coniston appearances, K7 was displayed extensively in the UK, United States, Canada and Europe, and then subsequently in Australia during Campbell's prolonged attempt on the land speed record in 1963–1964.

    To extract more speed, and endow the boat with greater high-speed stability, in both pitch and yaw, K7 was subtly modified in the second half of the 1950s to incorporate more effective streamlining with a blown Perspex cockpit canopy and fluting to the lower part of the main hull. In 1958, a small wedge shaped tail fin, housing an arrester parachute, modified sponson fairings, that gave a significant reduction in forward aerodynamic lift, and a fixed hydrodynamic stabilising fin, attached to the transom to aid directional stability, and exert a marginal down-force on the nose were incorporated into the design to increase the safe operating envelope of the hydroplane. Thus she reached 225mph in 1956, where an unprecedented peak speed of 286.78mph was achieved on one run, 239mph in 1957, 248mph in 1958 and 260mph in 1959.

    Campbell was awarded the Command of the British Empire (CBE) in January 1957 for his water speed record breaking, and in particular his record at Lake Mead in the United States which earned him and Britain very positive acclaim.

    On 23 November 1964, Campbell achieved the Australian water speed record of 216mph on Lake Bonney Riverland in South Australia, although he was unable to break the world record on that attempt.[9] [10]

    Land speed record attempt

    It was after the Lake Mead water speed record success in 1955 that the seeds of Campbell's ambition to hold the land speed record as well were planted. The following year, the serious planning was under way — to build a car to break the land speed record, which then stood at 394mph set by John Cobb in 1947. The Norris brothers designed Bluebird-Proteus CN7 with 500mph in mind.

    The British motor industry, in the guise of Dunlop, BP, Smiths Industries, Lucas Automotive, Rubery Owen as well as many others, became heavily involved in the project to build the most advanced car the world had yet seen. CN7 was powered by a specially modified Bristol-Siddeley Proteus free-turbine engine of 4450shp driving all four wheels. Bluebird CN7 was designed to achieve 475–500 mph and was completed by the spring of 1960.

    Following low-speed tests conducted at the Goodwood motor racing circuit in Sussex, in July, the CN7 was taken to the Bonneville Salt Flats in Utah, United States, scene of his father's last land speed record triumph, some 25 years earlier in September 1935. The trials initially went well, and various adjustments were made to the car. On the sixth run in CN7, Campbell lost control at over 360 mph and crashed. It was the car's tremendous structural integrity that saved his life. He was hospitalised with a fractured skull and a burst eardrum, as well as minor cuts and bruises, but CN7 was a write-off. Almost immediately, Campbell announced he was determined to have another go. Sir Alfred Owen, whose Rubery Owen industrial group had built CN7, offered to rebuild it for him. That single decision was to have a profound influence on the rest of Campbell's life. His original plan had been to break the land speed record at over 400 mph in 1960, return to Bonneville the following year to really bump up the speed to something near to 500 mph, get his seventh water speed record with K7 and then retire.

    Campbell decided not to go back to Utah for the new trials. He felt the Bonneville course was too short at 11miles and the salt surface was in poor condition. BP offered to find another venue and eventually after a long search, Lake Eyre, in South Australia, was chosen. It hadn't rained there for nine years and the vast dry bed of the salt lake offered a course of up to 20miles. By the summer of 1962, Bluebird CN7 was rebuilt, some nine months later than Campbell had hoped. It was essentially the same car, but with the addition of a large stabilising tail fin and a reinforced fibreglass cockpit cover. At the end of 1962, CN7 was shipped out to Australia ready for the new attempt. Low-speed runs had just started when the rains came. The course was compromised and further rain meant, that by May 1963, Lake Eyre was flooded to a depth of 3 inches, causing the attempt to be abandoned. Campbell was heavily criticised in the press for alleged time wasting and mismanagement of the project, despite the fact that he could hardly be held responsible for the unprecedented weather.

    To make matters worse for Campbell, American Craig Breedlove drove his pure thrust jet car "Spirit of America" to a speed of at Bonneville in July 1963. Although the "car" did not conform to FIA (Federation Internationale de L'Automobile) regulations, that stipulated it had to be wheel-driven and have a minimum of four wheels, in the eyes of the world, Breedlove was now the fastest man on Earth.

    Campbell returned to Australia in March 1964, but the Lake Eyre course failed to fulfil the early promise it had shown in 1962 and there were further spells of rain. BP pulled out as his main sponsor after a dispute, but he was able to secure backing from Australian oil company Ampol.

    The track never properly dried out and Campbell was forced to make the best of the conditions. Finally, in July 1964, he was able to post some speeds that approached the record. On the 17th of that month, he took advantage of a break in the weather and made two courageous runs along the shortened and still damp track, posting a new land speed record of 403.1mph. The surreal moment was captured in a number of well-known images by photographers, including Australia's Jeff Carter.[11]

    Campbell was bitterly disappointed with the record as the vehicle had been designed for much higher speeds. CN7 covered the final third of the measured mile at an average of 429mph, peaking as it left the measured distance at over 440mph. He resented the fact that it had all been so difficult. "We've made it — we got the bastard at last," was his reaction to the success. Campbell's 403.1 mph represented the official land speed record.

    In 1969, after Campbell's fatal accident, his widow, Tonia Bern-Campbell negotiated a deal with Lynn Garrison, president of Craig Breedlove and Associates, that would see Craig Breedlove run Bluebird on Bonneville's Salt Flats. This concept was cancelled when the parallel Spirit of America supersonic car project failed to find support.

    Double records

    Campbell now planned to go after the water speed record one more time with Bluebird K7 — to do what he had aimed for so many years earlier, during the initial planning stages of CN7 — break both records in the same year. After more delays, he finally achieved his seventh water speed record at Lake Dumbleyung near Perth, Western Australia, on the last day of 1964, at a speed of 276.33mph. He had become the first, and so far only, person to set both land and water speed records in the same year.

    Campbell's land speed record was short-lived, because FIA rule changes meant that pure jet cars would be eligible to set records from October 1964. Campbell's 429mph speed on his final Lake Eyre run remained the highest speed achieved by a wheel-driven car until 2001; Bluebird CN7 is now on display at the National Motor Museum at Beaulieu in Hampshire, England, its potential only partly realised.

    Rocket car plans and final water speed record attempt

    Bluebird Mach 1.1

    Campbell decided a massive jump in speed was called for following his successful 1964 land speed record attempt in Bluebird CN7. His vision was of a supersonic rocket car with a potential maximum speed of 840mph. Norris Brothers were requested to undertake a design study. Bluebird Mach 1.1 was a design for a rocket-powered supersonic land speed record car. Campbell chose a lucky date to hold a press conference at the Charing Cross Hotel on 7 July 1965 to announce his future record breaking plans:

    Bluebird Mach 1.1 was to be rocket-powered. Ken Norris had calculated using rocket motors would result in a vehicle with very low frontal area, greater density, and lighter weight than if he were to employ a jet engine. Bluebird Mach 1.1 would also be a relatively compact and simple design. Norris specified two off-the-shelf Bristol Siddeley BS.605 rocket engines. The 605 had been developed as a rocket-assisted take-off engine for military aircraft and was fuelled with kerosene, using hydrogen peroxide as the oxidiser. Each engine was rated at 8000lbf thrust. In Bluebird Mach 1.1 application, the combined 16000lbf thrust would be equivalent of 36,000 bhp (27,000 kW; 36,000 PS) at 840mph.

    Final record attempt

    To increase publicity for his rocket car venture, in the spring of 1966, Campbell decided to try once more for a water speed record. This time the target was 300mph. Bluebird K7 was fitted with a lighter and more powerful Bristol Orpheus engine, taken from a Folland Gnat jet aircraft, which developed of thrust. The modified boat was taken back to Coniston in the first week of November 1966. The trials did not go well. The weather was very poor, and K7 suffered an engine failure when her air intakes collapsed and debris was drawn into the engine. By the middle of December, some high-speed runs were made, in excess of 250mph but still well below Campbell's existing record. Problems with Bluebirds fuel system meant that the engine could not reach full speed, and so would not develop maximum power. Eventually, by the end of December, after further modifications to her fuel system, and the replacement of a fuel pump, the fuel starvation problem was fixed, and Campbell awaited better weather to mount an attempt.

    Death

    On 4 January 1967,[12] weather conditions were finally suitable for an attempt. Campbell commenced the first run of his last record attempt at just after 8:45 am. Bluebird moved slowly out towards the middle of the lake, where she paused briefly as Campbell lined her up. With a deafening blast of power, Campbell now applied full throttle and Bluebird began to surge forward. Clouds of spray issued from the jet-pipe, water poured over the rear spar and after a few hundred yards, at 70mph, Bluebird unstuck from the surface and rocketed off towards the southern end of the lake, producing her characteristic comet's tail of spray. She entered the measured kilometre at 8:46 am. Leo Villa witnessed her passing the first marker buoy at about 285mph in perfect steady planing trim, her nose slightly down, still accelerating. 7.525 seconds later, Keith Harrison saw her leave the measured kilometre at a speed of over 310mph.

    The average speed for the first run was 297.6mph. Campbell lifted his foot from the throttle about 3/10 of a second before passing the southern kilometre marker. As Bluebird left the measured kilometre, Keith Harrison and Eric Shaw in a course boat at the southern end of the measured kilometre both noticed that she was very light around the bows, riding on her front stabilising fins. Her planing trim was no worse than she had exhibited when equipped with the Beryl engine, but it was markedly different from that observed by Leo Villa at the northern end of the kilometre, when she was under full acceleration. Campbell had made his usual commentary throughout the run.

    Campbell's words on his first run were, via radio intercom:

    Instead of refuelling and waiting for the wash of this run to subside, Campbell decided to make the return run immediately. This was not an unprecedented diversion from normal practice, as Campbell had used the advantage presented; i.e., no encroachment of water disturbances on the measured kilometre by the quick turnaround in many previous runs. The second run was even faster once severe tramping subsided on the run-up from Peel Island (caused by the water-brake disturbance). Once smooth water was reached some 700m (2,300feet) or so from the start of the kilometre, K7 demonstrated cycles of ground effect hovering before accelerating hard at 0.63 g to a peak speed of 328mph some 200 metres or so from the southern marker buoy. Bluebird was now experiencing bouncing episodes of the starboard sponson with increasing ferocity.

    At the peak speed, the most intense and long-lasting bounce precipitated a severe decelerating episode — 328mph to 296mph, -1.86g — as K7 dropped back onto the water. Engine flame-out then occurred and, shorn of thrust nose-down momentum, K7 experienced a gliding episode in strong ground effect with increasing angle-of-attack, before completely leaving the water at her static stability pitch-up limit of 5.2°. Bluebird then executed an almost complete backflip (~ 320° and slightly off-axis) before plunging into the water (port sponson marginally in advance of the starboard), approximately 230 metres from the end of the measured kilometre. The boat then cartwheeled across the water before coming to rest. The impact killed Campbell instantly and broke K7 forward of the air intakes (where Campbell was sitting), and the main hull sank shortly afterwards.

    Mr Whoppit, Campbell's teddy bear mascot, was found among the floating debris and the pilot's helmet was recovered. Royal Navy divers made efforts to find and recover the body but, although the wreck of K7 was found, they called off the search, after two weeks, without locating his body. Campbell's body was finally located in 2001.

    Campbell's last words, during a 31-second transmission, on his final run were, via radio intercom:

    The cause of the crash has been variously attributed to several possible causes (or a combination of these causes):

    On 28 January 1967, Campbell was posthumously awarded the Queen's Commendation for Brave Conduct "for courage and determination in attacking the world water speed record."

    Recovery of Bluebird K7 and Campbell's body

    The wreckage of Campbell's craft was recovered by Gilgeous Diving Services (GDS Extreme Engineering, Liverpool)[15] along with amateur diver Bill Smith.[16] Lifting K7 was run and overseen by GDS Extreme Engineering and Smith’s team. The main section/hull first raised in March 2001 and later in May 2001, when Campbell's body was recovered. The largest section, comprising approximately two-thirds of the centre hull, was raised on 8 March 2001. The project began when Smith was inspired to look for the wreck after hearing the Marillion song "Out of This World" (from the album Afraid of Sunlight), which was written about Campbell and Bluebird.[17]

    The remains of Campbell's body were located just over two months later and recovered from the lake on 28 May 2001, still wearing his blue nylon overalls. On the night before his death, while playing cards he had drawn the queen and the ace of spades. Reflecting upon the fact that Mary, Queen of Scots had drawn the same two cards the night before she was beheaded, he told his mechanics, who were playing cards with him, that he had a fearful premonition that he was going to "get the chop".[18] It was not possible to determine the cause of Campbell's death, though a consultant engineer giving evidence to the inquest said that the force of the impact could have caused him to be decapitated.

    Campbell was buried in Coniston Cemetery on 12 September 2001 after his coffin was carried down the lake, and through the measured kilometre, on a launch, one last time. A funeral service was then held at St Andrew's Church in Coniston, after an earlier, and positive DNA examination had been carried out.[19] The funeral was attended by his widow, Tonia, daughter Gina, other members of his family, members of his former team and admirers. The funeral was overshadowed in the media by coverage of the 9/11 attacks in the United States.

    Campbell's sister, Jean Wales, had been against the recovery of her brother's body out of respect for his stated wish that, in the event of something going wrong, "Skipper and boat stay together".

    When Campbell was buried in Coniston Cemetery on 12 September 2001 she did not attend the service. Steve Hogarth, lead singer for Marillion, was present at the funeral and performed the song "Out of This World" solo.[20]

    Legacy

    Between them, Campbell and his father had set 11 speed records on water and 10 on land.[21] [22]

    The story of Campbell's last attempt at the water speed record on Coniston Water was told in the BBC television film Across the Lake in 1988, with Anthony Hopkins as Campbell. Nine years earlier, Robert Hardy had played Campbell's father, Sir Malcolm Campbell, in the BBC2 Playhouse television drama "Speed King"; both were written by Roger Milner and produced by Innes Lloyd. In 2003, the BBC showed a documentary reconstruction of Campbell's fateful water-speed record attempt in an episode of Days That Shook the World. It featured a mixture of modern reconstruction and original film footage. All of the original colour clips were taken from a film capturing the event, Campbell at Coniston by John Lomax, a local amateur filmmaker from Wallasey, England. Lomax's film won awards worldwide in the late 1960s for recording the final weeks of Campbell's life.

    In 1956, Campbell was surprised by Eamonn Andrews for the seventh episode of the new television show This Is Your Life.

    An English Heritage blue plaque commemorates Campbell and his father at Canbury School, Kingston Hill, Kingston upon Thames, where they lived.[23]

    In the village of Coniston, the Ruskin Museum has a display of Campbell memorabilia, and the Bristol Orpheus engine recovered in 2001 is also displayed. The engine's casing is mostly missing, having acted as a sacrificial anode in its time underwater, but the internals are preserved. Campbell's helmet from the ill-fated run is also on display.

    Campbell’s legendary BLUEBIRD K7 is now also on display at the Coniston Ruskin Museum.[24]

    World speed records established by Campbell

    Speed Record Vehicle Location Date
    202.32mph Water Bluebird K7 23 July 1955
    216.2mph Water Bluebird K7 16 November 1955
    225.63mph Water Bluebird K7 19 September 1956
    239.07mph Water Bluebird K7 Coniston Water7 November 1957
    248.62mph Water Bluebird K7 Coniston Water10 November 1958
    260.35mph Water Bluebird K7 Coniston Water14 May 1959
    276.33mph Water Bluebird K7 31 December 1964
    403.1mph Land Bluebird CN7 17 July 1964

    Further reading

    External links

    Notes and References

    1. Web site: Donald Malcolm Campbell . 27 December 2022 . www.britannica.com . en.
    2. Web site: CAMPBELL, Donald (1921–1967) & CAMPBELL, Sir Malcolm (1885–1948) . English Heritage . 12 October 2016 . https://web.archive.org/web/20170608212803/http://www.english-heritage.org.uk/visit/blue-plaques/campbell-malcolm-donald . 8 June 2017 . live .
    3. News: Malcolm and Donald Campbell memorial unveiled . The Telegraph . London . 29 November 2010 . 20 January 2011 . https://web.archive.org/web/20110129233637/http://www.telegraph.co.uk/motoring/news/8168731/Malcolm-and-Donald-Campbell-memorial-unveiled.html . 29 January 2011 . live .
    4. Donald Campbell: The Man Behind The Mask, David Tremayne, Bantam Press, London, 2004.
    5. GRO Register of Births: JUN 1921 2a 815 KINGSTON — Donald M. Campbell, mmn = Whittall
    6. Web site: Donald & Malcolm Campbell — Donald . The Racing Campbells . 26 September 2010 . dead . https://web.archive.org/web/20101003155431/http://www.racingcampbells.com/content/donald.asp . 3 October 2010 .
    7. News: Kellaway . Barnaby . Singer, who married world speed record-breaker Campbell, dies aged 93 . . 22 June 2021 . 7.
    8. Web site: About the Ghost Club . 30 July 2009 . dead . https://web.archive.org/web/20090301204630/http://www.ghostclub.org.uk/history.htm . 1 March 2009 .  — "A Brief History" section
    9. Web site: Press Release - Bluebird Replica Build Begins . K7 Project Bluebird Barmera Australia . 31 December 2014 . 27 August 2020.
    10. Web site: Donald Campbell's Water Speed Record Attempt . Monument Australia . 27 August 2020.
    11. Web site: On this day: World Land Speed Record broken. 17 July 2014 . 23 February 2015. https://web.archive.org/web/20150223070143/http://www.australiangeographic.com.au/blogs/on-this-day/2014/07/on-this-day-world-land-speed-record-broken. 23 February 2015. live.
    12. News: Speed king dies in crash . Spokesman-Review . Spokane, Washington . Associated Press . 5 January 1967 . 13.
    13. Sheppard, Neil (2011). Donald Campbell Bluebird And The Final Record Attempt. Stroud, UK: The History Press.
    14. Web site: The Telegraph . Duck may have played role in fatal Bluebird crash . Richard . Gray . 9 October 2011 . 8 March 2017 . https://web.archive.org/web/20170308221620/http://www.telegraph.co.uk/news/uknews/8815900/Duck-may-have-played-role-in-fatal-Bluebird-crash.html . 8 March 2017 . live .
    15. BBC TV 2001 lift documentary
    16. News: Simon . Armstrong . Donald Campbell's Bluebird: The battle back to Coniston . BBC News . 7 March 2024.
    17. Web site: A Day in the Lakes . marillion.com . Steve . Hogarth . 8 March 2001 . 12 August 2014.
    18. Web site: Disaster on the cards for the man who diced with death . 28 June 2023 . www.telegraph.co.uk. 8 March 2001 .
    19. News: Final tribute to water speed king. 12 September 2001. BBC. 12 September 2010. https://web.archive.org/web/20080102081922/http://news.bbc.co.uk/1/hi/uk/1537909.stm. 2 January 2008. live.
    20. Web site: Steve Hogarth Marillion eonmusic Interview September 2019 . 2024-06-13 . eonmusic: music for life. . en.
    21. Web site: Who Was Donald Campbell? . 26 April 2024 . Ruskin Museum . en-GB.
    22. Web site: Malcolm & Donald Campbell Speed Record Holders Blue Plaques . 26 April 2024 . English Heritage.
    23. Web site: Campbell, Donald (1921–1967) & Campbell, Sir Malcolm (1885–1948). English Heritage. 12 May 2018. https://web.archive.org/web/20180725063513/http://www.english-heritage.org.uk/visit/blue-plaques/campbell-malcolm-donald. 25 July 2018. live.
    24. Web site: 2024-05-10 . 'Bluebird effect' drives surge in tourism . 2024-06-13 . The Westmorland Gazette . en.