As you can see by the array of types of rank slides, the original owner (yes, a Squadron Leader) did a permanent tour in a tropical or warm-weather location (the rank slides on KD material). Very few serving RAF personnel these days would own the rather smart set of Tropical Mess Kit rank boards; from a reputable tailor, a set would cost c £120. To get all my uniforms re-ranked for my last warm-weather posting cost about £350; the mess kit rank boards were given to me, fortunately. The style of the other slides - individual braid for ranks separately stitched on to the backing material (first 3 left) would indicate they date from before the 1980s, perhaps.
The owner wasn't Wayne or Kevin. It was Ginger, of course!