There was a lot for support for Hitler in Britain.
Besides the numerous British born agents. There were the likes of Quartermaster Sergeant John Henry Owen Brown of the Royal Artillery.

Brown had been a member of the British Union of Fascists (BUF) before the war, but was also a devout Christian. Captured on the beaches of Dunkirk in May 1940. A British NCO who became leader of Special Detachment 517.

Then there was Thomas Cooper, another British soldier joined the Waffen-SS. He was posted to the SS Leibstandarte Adolf Hitler (LAH), where he eventually was transferred to the infamous SS "Totenkopf" infantry training battalion, and became a machine-gun instructor with the 5th Totenkopf Regiment and was made an NCO. Following the German invasion of the Soviet Union, he was assigned to the Wachbattaillon Oranienburg outside Krakow in Poland, he boasted about what he did to Jewish prisoners! Other British soldiers that fought for Hitler with distinction were Richard Berry and Roy Courlander. They both stated there was huge support for Hitler in England. And lets not forget Bernie Patterson and Killer Jordan who pin pointed 47 factories making aircraft parts, all bombs within eight days.

Then there was Sir Anthony Blunt who many think was a German spy during World War Two.