Walker joined the
RAF Volunteer Reserve on 2 September 1938 as an
Airman u/t Pilot. He then underwent pilot training at
RAF Kidlington,
Oxford, flying his first solo on 28 September. He was called up on 1 September 1939, the day
World War II broke out. He was posted to 1 Initial Training Wing,
Cambridge on 15 November. On 17 February 1940, he was posted to
RAF Brize Norton,
Oxfordshire to undergo officer training, He was immediately posted to
No. 616 Squadron RAF, who were based at
RAF Leconfield,
East Yorkshire and flew the
Supermarine Spitfire. they were engaged by
Messerschmitt Bf 109 fighters as they climbed to attack the bombers. He was pulled from the water by a fishing boat, then transferred to an
RAF Whaleback that brought him ashore at
Ramsgate, Kent. He later transferred to
No. 116 Squadron RAF, an
anti-aircraft unit. He was demobilised in September 1945. ==Later life==