Could be Northolt with the BOAC Bedford outside the hangar, the hangars also look like Northolt.
Did BOAC use Northolt? I always thought they were Heathrow based from 1946 and BEA were at Northolt until 1952. Those hangars do look suspiciously like the old LHR BOAC hangars (later British Eagle's) but then WW2 ex RAF hangars often tend to look similar so I am by no means certain. BOAC Bedford vans would not have been frequent at Lasham I wouldn't have thought. The van in the picture is a Bedford CA model which was not produced until 1952 so we are probably looking at mid to late 1950s.