Gordon Frederick Cummins was a British serial killer known as the Blackout Killer, the Blackout Ripper and the Wartime Ripper, who murdered four women and attempted to murder two others over a six-day period in London in February 1942. He is also suspected of committing two earlier murders in October 1941. Convicted of the murder of 34-year-old Evelyn Oatley, Cummins was sentenced to death and hanged at HMP Wandsworth on 25 June 1942.

HM Prison Wandsworth is a Category B men's prison at Wandsworth in the London Borough of Wandsworth, South West London, England. It is operated by His Majesty's Prison Service and is one of the largest prisons in the UK.