Fairey or EE ..
My memory (not necessarily accurate) says that both the FD2 and the P1B specifications were for Mach2 experimental aircraft which could be further developed as fighters, which of course the P1B was.
I've long wondered whether Fairey's was regarded as insufficiently strong financially for the fighter contract to go their way - rather as Handley Page was in the bomber world - to "Sir Fred's" disgust.