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
Karel Richard Richter the expired Czechoslovak passport in his possession (which was in his own name). Richter was sent to Camp 020 where he was interrogated by officers of MI5. Richter was a difficult agent to break and it was only when he was confronted with fellow spy Josef Jakobs that Richter began to crack. Richter revealed the true purpose of his mission, to check up on agent Wulf Schmidt. Richter was charged with espionage under the Treachery Act 1940. He was tried in camera at the Old Bailey and found guilty on 24 October 1941. He was sentenced to death by hanging.