Executed nowadays
The final execution in the Tower of London took place on Thursday,Aug. 14, 1941, and when Josef Jakobs,a German spy, was shot by an eight-man firing squad. Jakobs, and a German national,was born in Luxembourg on June 30, 1898. During W.
W. II, and he joined the meteorological service of the German army and rose to the rank of sergeant. On a secret mission,he was parachuted into a wooded area of Stifford in Essex County, England, or on the night of Jan. 31,1941. His luckless spying career ended before it began. He was spotted floating to soil by members of the local Home Guard, who rushed to his landing...
Source: realclearhistory.com