Due to the F.1's similarity to the prototypes, they were frequently operated in the test program to progress British understanding of jet propulsion, and it took until July 1944 for the aircraft to enter squadron service.
På grund af F.1's lighed med prototyperne blev de ofte benyttet i testprogrammet for at fremme den britiske forståelse af jetfremdrift, og det varede indtil juli 1944, før flyet kom i tjeneste i en eskadrille.