In an article from the Mitcham News & Mercury from 13th October, 1944, he is referred as coming from Langdale Avenue and as a P.O.W. in Stalag 2D.
The Find My Past website shows 10 ‘H. Powell’ records in the British Army Casualty Lists 1939-1945 who were captured in 1940, but none can be matched to Harry Powell.
Born 8th October 1919, Cyril E. King was living with his mother Ellen at 9 Swains Road, Mitcham, according to the 1939 Register. She was born 26th September 1898. With them was his sister Winifred E., born 6th March 1921.
In an article from the Mitcham News & Mercury from 13th October, 1944, he is referred to as possibly being a P.O.W.
No military records have been found on Ancestry/Find My Past.