I have to agree with BEagle (although I think he means 121 rather than 112, though - 112 were rather busy in sandy places at the time, while 121 were converting from Hurri IIB to Spits). 29(F) doesn't appear to be recorded as ever having used the Defiant.
IIRC, Gibson did very well with 29(F) and shot down a couple of German bombers (I dimly seem to recall reading that it was three, but this was years ago).