Josef Jakobs SW3, on 4–5 August 1941. The trial was held "in camera" because the German agent had been apprehended in a highly classified intelligence operation known as the Double Cross System. The British were aware that Jakobs was coming because his arrival information had been passed on to MI5 by the Welsh nationalist and "Abwehr" double agent Arthur Owens. After a two-day trial which involved hearing the testimony of eight witnesses, Jakobs was found guilty of spying and sentenced to death. Jakobs's execution took place at the miniature rifle range in the grounds of the Tower of London on 15 August
Josef Jakobs German cabaret singer and actress named Clara Bauerle, who became a spy because she had spent a few years performing in the West Midlands and could speak English with a Birmingham accent. Jakobs said Bauerle was meant to join him after he had made “radio contact,” but then doubted she would now be sent since he was arrested before he could communicate with his team. Bauerle's whereabouts remained unknown for several decades, and it was theorized that she may have died under suspicious circumstances in England. In 2016, it was discovered that Bauerle had died in a Berlin hospital on