Pardon my ignorance in these matters. My stepfather joined the VR pre war based at Scampton. Trained as a WOP/AG. eventually becoming a squadron signals leader before converting to pilot. I recall a PFF certificate on the wall so would this have resulted in renumber? He became a VRT (T) officer and I'm think he gained another No. My own VR(T) No began 208XXX issued in 1970. I'd like to trace his path, particularly time spent on 7 and 156