The Hawk Speed Six was developed in parallel as a more powerful single-seat racer, as the one-off M.2E, with the 200 hp de Havilland Gipsy Six engine.

[3] G-ADGP was built to the order of Luis Fontés for the 1935 King's Cup air race.

By now the canopy had been modified and the wing span reduced from 38 ft to 28 ft.[5] The aircraft has changed hands several times since and had a significant postwar racing career.

[4] G-ADOD was built to the order of Ruth Fontés, who already owned M2F Hawk Major G-ACXT, with the intent of beating her brother Luis (see above) in the 1935 King's Cup.

It was fitted with an even more powerful 220 hp Gipsy Six R racing engine, originally developed for the de Havilland DH.88 Comet racer.

Clouston had it modified with a cockpit canopy, reclining seat and greater fuel capacity, and entered it in the Schlesinger Race from Portsmouth to Johannesburg.