Just be aware that Gordon Correra's programmes about GCHQ ( and prior to that MI5 and MI6 ) are made with the co-operation of those agencies. I have written to

Just be aware that Gordon Correra's programmes about GCHQ ( and prior to that MI5 and MI6 ) are made with the co-operation of those agencies. I have written to the BBC and asked what conditions the agencies laid-down but I did not receive a reply.