Terry Biddlecombe Winner at Fontwell?

On what date did Terry Biddlecombe win on a horse called Stormtrooper at Fontwell Park? It was the hot favorite and a horse called Darting Legend fell in the same race.

Answer: Terry's riding career spanned the years 1958 - 1974 and totalled 908 winners. However it's not possible to trace records for these 2 horses.