David Haller (swimmer) explained

David Haller ^[1] (born 27 January 1945) is a British former swimmer and swimming coach. He competed in the men's 100 metre freestyle at the 1964 Summer Olympics,^[2] and was subsequently National Team Coach for Britain at ten Olympic Games and for England, Wales or Hong Kong at twelve Commonwealth Games.^[3] Among those whom he coached are the Gold Medallists David Wilkie, Duncan Goodhew and David Davies. He was voted “Coach of the Year” by the British Swimming Coaches Association on nine occasions.^[4]

Notes and References

The Official Gazette, 30 December 2008, Supplement No. 1, p. 17.
David Haller Olympic Results . https://web.archive.org/web/20200417191358/https://www.sports-reference.com/olympics/athletes/ha/dave-haller-1.html . dead . 17 April 2020 . 25 October 2016.
https://www.penarthtimes.co.uk/sport/11424825.olympic-swimming-coach-from-penarth-announces-his-retirement/ Olympic swimming coach from Penarth announces his retirement
“Haller announces his retirement”, britishswimming.org, 16 September 2014.https://www.britishswimming.org/news/latest-swimming-news/haller-announces-his-retirement/