Dambuster of the Day No. 40: Leonard Sumpter

 

Sumpter McCarthy screen

Dambusters Len Sumpter (left) and Joe McCarthy (right), outside the Petwood Hotel, Woodhall Spa. Probably taken early in 1944.  The Petwood was then in use as the Officers Mess for squadrons based at RAF Woodhall Spa. Pic: Leonard Cheshire Disability Archive

Flt Sgt L J Sumpter
Bomb aimer

Lancaster serial number: ED929/G
Call sign: AJ-L
First wave. First aircraft to attack Eder Dam. Mine dropped accurately but no breach caused. Aircraft returned safely.

Bomb aimer Leonard Sumpter had already served two stints in the Grenadier Guards before transferring to the RAF in 1941. He was a little older than the average Dambuster, having been born in Kettering in 1911. He had joined the army as a boy soldier in 1928 and left again in 1931. He rejoined his old regiment at the outbreak of war but then in 1941 he persuaded his superiors to let him transfer to the RAF.
After training in England and Canada, he was posted to 57 Squadron at Scampton in September 1942. He then flew as the bomb aimer on 13 operations in Lancasters as part of Flt Lt G W Curry’s crew. Curry was then grounded with ear trouble, and his crew were told they had to break up.
However, he and his colleague, flight engineer Bob Henderson, heard a rumour that a new squadron was being formed in a neighbouring hangar, and went looking for David Shannon, who was apparently on the lookout for a bomb aimer and an engineer. They both impressed the young pilot, and joined his crew.
After the Dams Raid, for which he received the DFM for his accurate attack on the Eder Dam, Sumpter continued flying in Shannon’s crew, as 617 Squadron undertook a series of operations. He was commissioned in June 1943.
In 1944 Mosquitoes were introduced into 617 Squadron as a more effective method of marking targets, and he and Shannon moved over together. He received the DFC in June 1944. Shannon was finally taken off operations, but Sumpter reverted to Lancasters for a short time as part of Flt Lt L M Marshall’s crew. Altogether, by the end of the war he had flown 35 operations.
He was demobbed from the RAF after the war, but rejoined in 1946 in the Physical Fitness branch, and served until 1950.
After the war, Sumpter was a regular participant in 617 Squadron reunions and activities, and his audio recollections at the Imperial War Museum have been regularly trawled by historians. He was generous with his time to many people, as this extract from a letter sent to a schoolboy in the 1970s shown below demonstrates.

Sumpter letter

Pic: Bonhams

Len Sumpter died on 30 November 1993 in Luton, a few months after his skipper.

 

More about Sumpter online:
Several more pictures of Sumpter at the Leonard Cheshire Disability Archive
Sumpter’s medals, sold at auction in 2003 (also contains a biography)

Survived war. Deceased.

Rank and decorations as of 16 May 1943.
Sources:
Richard Morris, Guy Gibson, Penguin 1995
John Sweetman, The Dambusters Raid, Cassell 2002

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