Martin, are the photos of the Sunderland in the building with the red steel work taken at Hendon? I was there on an earlier visit to London some years ago, and it looks familiar. One of our table companions on our recent QE2 cruise was a former RAF pilot who flew Sunderlands, Avro Shackletons, helicopters, and for a while, Nimrods. He retired from the RAF in the mid 70s to take up a position as a civil servant in the Social Security Department in England. He had some great tales to tell of his experiences as a young pilot of the various aircraft in many countries, including the Middle East, Singapore, Malaya, and South Africa.
Peter.
PS: What a great photo resource Airliners.net is, I use it constantly.