If you go to the RAFForum;
The Royal Air Force Forum and access Sqdns 1 - 25, click on 20 Squadron and go to page 8, there is a squadron photograph taken in early 1963 and some of the pilots in it may well have flown in that occasion. In subsequent pages there is an ex 20 Sqdn pilot who has named the others, he may be able to give you the information you are seeking.
Bon Chance
John M.