Behind the Telegraph paywall is the Obituary of Group Captain John Watson ("Johnnie") Foster DFC, AFC, who died Monday October 30th 2017 at the age of 95.
His DFC citation reads
Flight Lieutenant John Watson FOSTER (134757),
R.A.F.V.R., 65 Sqn.
This officer has completed a large number of
sorties during which he has led the squadron on
many occasions. He has invariably displayed a
"high degree of skill and courage and has contributed
materially to the successes obtained. He
has proved a most valuable member of the
squadron/
A fighter pilot with credited victories, he flew Spitfires and later Mustangs in France and Germany. He rose from a VR Sgt in 1942 to S/L O.C 65 Sqn in March 1945. Post war he stayed in the Royal Air Force and was granted a permanent commission and was promoted back to the rank of S/L in 1951. He was promoted to Group Captain in 1967. He retired in 1975.
A French language website records:
Johnny Foster was born in Belfast, Northern Ireland, on August 1, 1922. He studied at Campbell College and spent two years at the Faculty of Medicine before joining RAFVR in August 1940. He began training at 5 EFTS of Stoke-on-Trent and 32 SFTS of Moose Jaw, Canada, qualifying as a pilot with the rank of Sgt. He completed his operational training at Hawarden's OTU 57 before being posted to Squadron 19 in April 1942. Promoted to the rank of F/L on September 18, 1942, he completed his first tour of operations in December 1943 and became a flight instructor. OTU 57 from January to August 1944. In August, he was reassigned to Squadron 19 but the following month was transferred to Squadron 65, a unit in which he later became Flight Commander. He took command of the Squadron in March 1945 and received the DFC whose announcement appeared on May 11, 1945.
He continued to serve in the RAF after the war and remained with Squadron 65 until September 1946. He then joined the British occupation forces in Japan from November 1946 to August 1948. Back in Britain, he served on different bases and became leader of the acrobatic team flying Meteors and was awarded the AFC. On September 5, 1950, he took command of Squadron 257, equipped with Meteors. He then occupied various staff positions, in Great Britain and abroad, in Egypt, in Cyprus and participated in Suez operations in 1956. From 1958, he worked at the Air Ministry in various Staff positions. He left the RAF in 1975 in the rank of Group Captain.
FOSTER John Watson