Even before the Pioneer flew, the Air Ministry encouraged Carter to design a practical jet fighter since the Pioneer was not suitable because it was unlikely that an engine of at least 2,000 lbf (8.9 kN) thrust would be available in the near future.
Selv før Pioneer fløj, opfordrede Luftministeriet Carter til at designe en praktisk jetfighter, da Pioneer ikke var egnet, fordi det ikke var sandsynligt, at en motor på mindst 2,000 lbf (8,9 kN) stød ville være tilgængelig i den nærmeste fremtid.