In May 1941 he was posted to No. 53 Operational Training Unit (OTU) at Heston as an instructor and then to the Central Flying School, Upavon on an instructor's course. A spell at No. 61 OTU followed. In November 1941 he joined No. 154 Squadron as a flight commander. In March 1942 he joined No. 56 Squadron flying the Hawker Typhoon. In August he became a test pilot on Typhoons at Gloster Aircraft, until February 1943 when he returned to operations with No. 193 Squadron.
Fokes took command of No. 257 Squadron RAF flying the Hawker Typhoon in July 1943. He was awarded the Distinguished Flying Cross in March 1944, and was due to end his tour just before D-Day, but elected to remain with the squadron until after the invasion. His aircraft was shot down over Caen, France, during a ground attack mission. Fokes bailed out, but was killed when he hit the ground before his parachute opened.
List of air victories
Fokes' combat record reads: nine kills, four shared kills, two unconfirmed kills, three probable kills, one damaged and one shared damaged.
In October, 1940, this airman was on patrol with his squadron at 30,000 feet, when a formation of more than twenty Messerschmitt 109s was sighted. Sergeant Fokes attacked one, and followed it down to the ground where it crashed. He has displayed great courage and tenacity and has personally destroyed at least six enemy aircraft.
This officer has completed a very large number of sorties during which he has shot down at least 10 enemy aircraft. He is a fine leader and has invariably pressed home his attacks with skill and resolution.
