And I suppose MI5 was also running the extermination camps for the Nazis on contract also.
I don't know about the extermination camps, perhaps you could tell us more about it. I have seen maps of where the V2's actually fell, and the maps the Germans had of where they thought they had landed, based on 'their' agents reports. The German maps show the V2's clustered around the East End, The home office maps show them falling in the 'burbs. The 'agent' reports that MI5 forwarded were statistically skewed to redirect German targeting. Churchill was not amused and said that they should not get involved with the aiming of bombs. MI5 appear to have disregarded the instruction.
To maintain the deception they also got one of the Agents a certain 'Garbo' to start radioing his control in Madrid at 3am on 6th June 1944 a warning that the Normandy Landing were underway. He eventually got through at 0608 hours, far too late, of course, for the information to be of any use the German High Command.