The next stage is to work through the Operations Record Books of 575 and 48 Sqns, held in the National Archives at Kew
Royal Air Force operations record books 1939-1945 - The National Archives You can download them for a fee, but if you can get to Kew you can see the digitised files free of charge. It looks as though he became a flying instructor at Cranwell and later had ground postings. Returning to flying after a refresher course, he went to Dyce (Aberdeen airport) for an ATC summer camp, where he may have been giving cadets air experience flights. In 1955 he either left the full-time RAF and became a reservist (most officers and airmen had to serve a number of years in the reserve) or perhaps went to instruct reservists.