I was still wearing RAF Regiment flashes at the time,
And of course these days
TTN, you could continue to wear them!
This is subject to curious conditions, envisaging a three-tier Regt. A gunner who remusters to another trade
as an airman, may still wear "mudguards" but not as a SNCO.
Similarly, a Regt SNCO who remusters as - for example - Airman Aircrew (sorry NCA) may wear them as a SNCO, but not if commissioned.
Those like yourself, JROC qualified, may wear the insignia as an officer.
I'm sure there were OBEs to be won devilling out those rules......