See Operation Mincemeat for Major Martin's role in WW2. The body was identified in 1996 as that of Glyndwr Michael, a Welsh homeless man, but the Wikipedia page puts forward a number of other possibilities.
Wikipedia has this grim photo captioned "Corpse of 'William Martin', prepared for release into the water".
This section lists the memorials where the subject on this page is commemorated:
Major William Martin
The Biblical quotation draws attention to the secrecy which was essential to ...
Aged 35, Detective Sergeant Young was shot dead on duty on 14 July 1915 while attempting to arrest a man with a gun. Buried in Hampstead Cemetery, Fortune Green. From Met Police: "Alfred had been ...
Soldier. Born Cecil Harold Sewell in Greenwich. On 29th August 1918 at Fremicourt, France, he was in command of a section of Whippet light tanks. He crossed open ground under heavy machine-gun fire...
War Reserve Constable who joined the Met Police on 3 September 1939. He was based at the Hyde Park Police Station when he was murdered. He was knifed by Frank Stephen Cobbett, a tramp who was rec...
Co-partner or employee of the South Suburban Gas Company. Served but did not die in WW1.
