I have almost no info on which Hurricane was flown off Indomitable by which pilot, just info on which was flown by whom on 5 April.
According to Bloody Shambles p. 401, BG696 was flown by Sgt Morehouse on 5 April. Z5461 was the aircraft Peacock-Edwards flew on 5 April.
On page 74 of Hurricane Aces 1941-1945, there is a picture of Hurricane BN125 of 258 Squadron at probably the Racecourse. It looks like it has made a wheels-up landing. The caption does not give a date for the photo but it's apparently from March or April 1942, so BN125 was probably flown off Indomitable. This is the only one I know off from a source other than Bloody Shambles.