Only 18 days following the S.6B's Schneider triumph, the British Air Ministry issued Specification F7/30, which called for a modern all-metal land-based fighter aircraft and sought innovative solutions towards a major improvement in British fighter aircraft; perhaps most significantly, the ministry specifically invited Supermarine to participate. Accordingly, Mitchell's next endeavour after the S.6B was to produce the company's submission to meet this specification, which would be designated the Type 224. While the Type 224 would not meet with government approval and ultimately be a disappointment, Supermarine's next project would result in the development of the legendary Spitfire.