Took these today for a friend, this is a Phelon & Moore 3.5hp at the RAF Museum, next to their Triumph Model H. The Phelon & Moore 3.5hp entered production in 1914 and was chosen as the standard motorcycle for the Royal Flying Corps. At the end of the war, the RAF had 3380 Phelon & Moore motorcycles on charge but by 1920 had just under 500 left.
WAAC on a Phelon & Moore fitted with a sidecar - anyone know what the cap and trousers are?