Vickers Monoplane No.6 powered with a 70 hp Viale seven-cylinder air-cooled radial engine. Machine competed in the Military Competition of 1912. There is a detailed description of this machine at
This picture has not been published by Flight there.
The man leaning against the propeller could be L.F. Macdonald the Vickers' pilot (beware the statement 'could be', this is not certain).