Had to go over to Belfast just now, a nice sight of an Atlantic Electra on the ground there .....
Going back (quickly) to Lulsgate in the 1960s, I recall one of these there
http://www.airliners.net/open.file/273898/M/
It was quite a sight silhouetted on the skyline of the ramp as you came up the A38 out of Bristol. It did a regular evening flight a couple of times a week.
Another 10 of SN's points to those who can identify it without looking at the caption.