Shackman
This was in 1965, and it was definitely a Mk.2 of 42 Sqn. They re-equipped to Mk 3s shortly afterwards.
MATELO
My lips are sealed. There were of course mattresses in both the nose (bomb aimer) and tail cone(lookout). It was alleged that on one occasion at Ballykelly some of the staff of the Joint Anti Sumbarine School (which include WRNS) were taken for an air experience flight. When everyone climbed out of the aircraft after a rather bumpy landing, a MATELO and a Wren emerged from the tail cone looking somewhat dishevelled. They reckoned the landing was the best bit of the flight.