Aeroplane Monthly 1980-09
P.Heath - Underneath the Arches
"SISKIN" v. "GAMECOCK": The Armstrong-Whitworth "Siskin IIIa" (supercharged "Jaguar") piloted by Sqdr.-Ldr. E. O. Grenfell (Tangmere)
Bristol-built Siskin IIIA J8834 takes off from Northolt during the Sasoon Cup Race on May 28, 1929, piloted by Sqn Ldr E. O. Grenfell. Note the red squadron marking along the fuselage side. The significance of the marking beneath the cockpit is not known - can any reader help?