Able Seaman Keith Mayor was one of the raiding party at Kopervik, Norway (Operation Checkmate). He was captured and later executed at Belsen Concentration Camp having been transferred there from Sachsenhausen. He has no known grave. Son of John and Gertrude L. Mayor, of Preston, Lancashire.

Read detailed report on his death here: https://blog.nationalarchives.gov.uk/the-british-sailor-murdered-at-bergen-belsen-the-75th-anniversary-of-the-bergen-belsen-trials/

Sworn affidavit of Rolf Klink concerning Keith Mayer, taken by Major H H Cochrane at Bergen-Belsen, 7 May 1945, Catalogue ref: TNA WO 309/33.
Report on the interrogation of Emmerich Wilhelm S.S., since 1938 in Auschwitz Concentration Camp and since 26/2/1945 in Bergen-Belsen Camp as Rapportführer, 24 April 1945, Catalogue ref: TNA WO 309/33. 
Exhibit ‘A’ (38); Sworn affidavit of Max Markowicz concerning Keith Mayer, taken by Major H H Cochrane at Bergen-Belsen, 4 May 1945, Catalogue ref: TNA WO 309/33. 
Ibid 
T R Moreman, British Commandos 1940–46 (Oxford: Osprey, 2006), p. 24. 
Philip D Chinnery, Hitler’s Atrocities Against Allied POWs: War Crimes of the Third Reich (Barnsley: Pen & Sword, 2018), p. 265. 
Sworn affidavit of Rolf Klink concerning Keith Mayer, 7 May 1945, Catalogue ref: TNA WO 309/33. 
Larissa Allwork & Rachel Pistol (eds.) The Jews, the Holocaust, and the Public: The Legacies of David Cesarani (Basingstoke: Palgrave Macmillan, 2019), p. 215. 
Letter from Able Seaman Keith Mayor to his parents at Margaret Road, Preston, reproduced by Sunday Express, 17 June 1945, Catalogue ref: TNA WO 309/33.