Thanks very much for this comprehensive reply ICM. But it must still have been incredibly expensive, to develop a virtually brand new aircraft (apart from, I understand, some of the Britannia wing box) for so tiny a production run. Surely it would have been cheaper to buy ten C-133s? Tho that certainly wasn't an aircraft without problems, but one went on flying into the 21st century:
655 Anchorage 30-9-05 C133 full side on 1e | Flickr - Photo Sharing!
And here, I think, is the one and only photograph I ever took of a Belfast-it's the one preserved (thank the lord) at Cosford:
ScanImage5 1024 | Flickr - Photo Sharing!
And the aircraft above is the same as the one in your photo ICM.