I also wanted to know a bit more about the reason for the Hunter being there, at that time.
That bit is easy. The West Raynham Hunter sqns, 1 and 54, each went to El Adem a couple of times a year, 2-3 weeks each time, for Armament Practice Camps, concentrated periods of weapon training on the nearby range in almost constant good weather - as opposed to the almost constant bad weather (I exaggerate slightly) on the UK ranges at Cowden (Yorks) and Theddlethorpe (Lincs).
The El Adem range was also used by 2 & 4 Sqns from Gutersloh, and Canberras from Germany and Cyprus; possibly other sqns as well.