The RAF Personnel set was released in 1972. My own set is slightly younger (1975?) and though it was an exciting change from infantry figures I remember being rather disappointed on opening the box to find them moulded in yellow plastic. Why, Airfix, why? Ah well. Over the years several of the figures have been used for conversions - the cyclists in particular I remember being useful. The remainder of them languished in a box for 25 years until they were subjected to that most dreadful of fates for a toy soldier - being painted by me! I think I have a complete box of these somewhere, so a further post may follow in the fullness of time.
There are some nice poses in this set - here are the standing and running aircrew. The very basic paint job is over a matt black undercoat.