Air Vice Marshal Alexander Vallance Riddell Johnstone, CB, DFC, AE, DL (2 June 1916 – 13 December 2000) was a Scottish airman.

Alexander Vallance Riddell Johnstone was born in Glasgow on 2 June 1916 and was educated at Kelvinside Academy.

[1] After participating in engagements with lone German raiders off the Scottish coast in late 1939-early 1940, he was given command of 602 Squadron in July 1940 at the age of 24.

[3] The squadron was transferred south to RAF Westhampnett in West Sussex, where it was stationed throughout the Battle of Britain.

In September 1943 he moved on to RAF Fairwood Common, West Glamorgan, as sector commander.

In May 1944 Johnstone was promoted to acting group captain[7] on the Allied Expeditionary Air Force operations staff preparing for the D-Day invasion.

[8] In 1946 Johnstone was appointed air attache in Dublin, and went on to serve as station commander, RAF Ballykelly.

In 1953 he was made Commanding Officer of the Air Sea Warfare Development Unit at RAF St Mawgan.