They're Handley Page Hastings, one of which is still to be seen in the Airspace building at Duxford.
(In answer to the question about the "taildraggers" in the 1953 photo).
In addition there is one at the Newark Aircraft Museum. Its a T5 which was previously at Lindholme on the Strike Command Bombing School, used for training V Force nav radars. On open days, etc you can look around for a small charge. I was horrified to see that they had altered the interior of the aircraft by moving the student navs' seats nearer to the table. I certainly didnt recall having any problems squeezing into my seat 40 years earlier!