| Type: | WMC |
| Grand Prix: | British |
| Date: | 7 August |
| Year: | 1926 |
| Official Name: | Grand Prix of the Royal Automobile Club |
| Country: | UK |
| Race No: | 4 |
| Season No: | 5 |
| Location: | Surrey, England |
| Course: | Brooklands |
| Course Mi: | 2.61 |
| Course Km: | 4.21 |
| Distance Laps: | 110 |
| Distance Mi: | 287.76 |
| Distance Km: | 463.10 |
| Fast Driver: | Henry Segrave |
| Fast Team: | Talbot |
| Fast Time: | 1:49.5 |
| Fast Country: | UK |
| First Driver: | Robert Sénéchal |
| First Team: | Delage |
| First Country: | FRA |
| First Driver2: | Louis Wagner |
| First Country2: | FRA |
| Second Driver: | Malcolm Campbell |
| Second Team: | Bugatti |
| Second Country: | UK |
| Third Driver: | Robert Benoist |
| Third Team: | Delage |
| Third Country: | FRA |
| Third Driver2: | André Dubonnet |
| Third Country2: | FRA |
The first Grand Prix of the Royal Automobile Club, commonly referred to as the 1926 British Grand Prix was a Grand Prix motor race held at the Brooklands circuit on 7 August 1926.[1]
It was the fourth race of the 1926 AIACR World Manufacturers' Championship season, and the first-ever British Grand Prix.
The full banked Outer Circuit was not used for the Grand Prix. Instead cars continued straight on at The Fork and drove up the Finishing Straight (rather than bearing right to take the full length of the Members' Banking), on which two sandbank chicanes were constructed, one at either end of the straight, before rejoining the Outer Circuit, having cut out entirely the section passing behind the Members' Hill. Between the chicanes and just before the finishing line the cars were funnelled through the right-hand span of the footbridge which had been built for the occasion across the straight and which had two supports resting on the track itself.
This arrangement gave a circuit length of around 4.21 km, so – together with the fact that the race started at the top of the Finishing Straight, meaning that the first lap was not the full 4.21km and included only one of the two chicanes – the 110 lap race was 462 km, less than the 600 km minimum mandated by the regulations of the 1926 World Manufacturers' Championship, but nonetheless the race still counted.[2]
The race attracted one of the better entries of the 1926 season, with thirteen cars listed in the official programme – albeit that two of these were the privately-owned Talbot and Bugatti cars entered by Malcolm Campbell for himself to drive, the popular British privateer opting for the Bugatti the day before the race. With the works Bugatti team not entering the race, firm favourites to win were the Delages of Robert Benoist, Louis Wagner and Robert Sénéchal. The three new French built Talbots were painted green in order to promote the British arm of S.T.D Motors, but braking issues put them at a disadvantage. Finally there were the modified Aston Martin of George Eyston, Frank Halford's Halford Special (itself based on an Aston Martin chassis), two Thomas "Flat Iron" Specials (an unsupercharged version for J. G. Parry-Thomas and a supercharged model for Clive Gallop)[3] and a front-wheel drive Alvis for Maurice Harvey. Mechanical problems led to both Thomas Specials and the Alvis being withdrawn, meaning that nine cars lined up for the start.[4]
At the start, Albert Divo took an immediate lead, followed initially by Campbell and Eyston, while the Delages of Sénéchal and Wagner made very slow starts. By the end of the banking coming onto the Finishing Straight, the other two Talbots had taken second and third place, making it a Talbot 1–2–3, Divo–Jules Moriceau–Henry Segrave. This was short lived, however, as when Moriceau braked for the first sandbank, his front wheels wobbled wildly causing the front axle to collapse, putting him out of the race. By the end of the first lap, Benoist had moved up to third place.
Over the next five laps, Divo and Segrave tried to pull away from Benoist, and although much faster under acceleration they were unable to do so due to the Talbot's inferior braking. Meanwhile Sénéchal had started moving up the field, making up for his poor start, but his team-mate Wagner had made several pitstops due to a misfiring engine, eventually retiring after 6 laps. After 7 laps, Divo's engine too started misfiring, forcing him to pit, dropping him to last place. By lap 10 Sénéchal had moved up to third place, behind Segrave and Benoist, while Halford had overtaken Campbell for fourth place.
On lap 15, Segrave stopped to change a damaged tire, dropping him to third, while Divo was trying to make up ground, having overtaken Eyston's slow Aston Martin for sixth place. Benoist was now two laps ahead of everyone, and his lead increased every lap. On lap 35, Benoist stopped to change his rear tires, but did not lose the lead to Segrave who had overtaken Sénéchal. Meanwhile Divo made another long pitstop, dropping him back to last place, and well out of contention.
Both engine and brake problems then followed for Segrave, making several pitstops to investigate the issues, dropping him right back, and eventually retiring after 62 laps. Eyston suffered a similar fate, retiring with a blown gasket. Segrave's trouble promoted Halford up into third place, but not for long as Campbell was quickly gaining on him. A pitstop for Sénéchal only served to increase Benoist's now huge lead of several laps. Halford made a slow stop, dropping him behind Campbell until he too made a pitstop. However Halford was to lose third place again, passed by the charging Divo.
Benoist too made a pitstop, and had some trouble restarting his engine, causing his lead to reduce considerably, but was able to restart still with more than a lap in hand over Sénéchal. The high temperatures were causing the drivers problems, especially the Delages and the remaining Talbot of Divo. Benoist stopped on his 81st lap with his exhaust glowing white hot, wrapping some asbestos sheeting around it to stop it from burning through the car. An issue with Sénéchal's exhaust made the problem even worse, forcing him to stop on lap 83 and hand over to Wagner. Halford also had trouble on his 83rd lap, retiring with a broken prop shaft, pushing the car all the way back to the pits.
Wagner was now in a lot of pain, forcing him to stop frequently to dip his feet in water due to the intense heat, causing his lead to dwindle. After a valiant fight, Divo too needed to stop frequently, but his car then refused to restart, forcing him to retire after 87 laps. This left just three cars for the final 15 laps. Benoist handed his car over to Dubonnet (who had not driven a lap of the circuit before and was wearing an ordinary blue lounge suit), who was being chased now by Campbell's Bugatti. Both drivers were still trying to catch Wagner, who was stopping frequently to bathe his feet, but this was not the case, with Wagner eventually winning with over four laps lead. Dubonnet struggled with flames coming from his engine, and having to learn the circuit as he drove, allowing Campbell to close the gap, and on lap 102 overtake him for second place, which he held to the end.
| Pos | No | Driver | Car | Laps | Time/Retired | |
|---|---|---|---|---|---|---|
| 1 | 14 |  Robert Sénéchal Louis Wagner | Delage 15 S 8 | 110 | 4h00m56.6 | |
| 2 | 7 |  Malcolm Campbell | Bugatti 39A | 110 | 4h10m44.2 | |
| 3 | 2 | Robert Benoist André Dubonnet | Delage 15 S 8 | 110 | 4h13m08.4 4h18m08 | |
| Ret | 1 | Albert Divo | Talbot GPLB | 87 | Supercharger | |
| Ret | 5 | Frank Halford | Halford Special | 82 | Prop shaft joint | |
| Ret | 9 | Henry Segrave | Talbot GPLB | 62 | Supercharger | |
| Ret | 3 | George Eyston | Aston Martin GP | 44 | Gasket | |
| Ret | 10 | Louis Wagner | Delage 15 S 8 | 6 | Engine misfire | |
| Ret | 6 | Jules Moriceau | Talbot GPLB | 0 | Front axle | |
| DNS | 4 | Clive Gallop | Thomas Special | n/a | ||
| DNS | 8 | Maurice Harvey | Alvis GP | n/a | ||
| DNS | 11 | Malcolm Campbell | Talbot | n/a | ||
| DNS | 12 | J G Parry-Thomas | Thomas Special | n/a | ||
| Sources:[5] | ||||||