This talk of Lancasters takes me back to an early 1970s visit to Blackpool, when I saw NX611 parked behind the Air Navigation and Trading hangar (I think). I'm sure I took a photo (on my Kodak Instamatic-all I could afford as a young teenager, as I then was), but sad to say, it didn't show up two years ago when I trawled through all my photos going back to 1971, to scan in all the aircraft ones. If I ever find it, I'll post a link here to it.
Nearly as good however, here is a link to a photo I took of the Strathallan Lancaster in September 1976-I'd graduated to a decent viewfinder camera by then (a Ricoh 500G):
JetPhotos.Net Photo » G-BCOH (CN: 277) Private Avro Lancaster by Michael Blank