Ernest Russell Lyon (19 December 1922 – 27 July 1944) was a flying officer in 234 Squadron of the Royal Air Force during the Second World War.
He was known as Russell.
On 27 July 1944, Russell piloted a Supermarine Spitfire, flying with seven other Spitfires, on a mission over Lorient in southern Brittany.
His Spitfire was hit by flak over the Lorient area and was seen to crash in flames near Ploemeur.
Lyon was reported as missing in action and later he was reported as presumed dead.In 2001 a Spitfire crash site was found by local history enthusiasts near Ploemeur, and through further research the crash site was identified as the location of Lyon's Spitfire.
The French researchers also found a grave in the nearby Commonwealth War Graves Commission Cemetery at Guidel which is marked Unknown RAF Airman and where the contemporary Cemetery Register records that the burial of an unknown English casualty took place on 29 July 1944.