If you look at the CAA website and hunt out GID 21 version 5, you'll find that the PPL accreditation criteria for UAS, but more specifically for JFTS/EFTS courses are much better than they were....
Any UAS member needing 'conversion' training to PPL level should try contacting their nearest RAF Flying Club Association (RAFFCA) Club. Under GAI 5070 para 8 e, 'Members of the University Air Squadrons, the Air Training Corps and the Air Section of the Combined Cadet Force' are entitled to be Full Members of a RAFFCA Flying Club. These are rather cheaper to fly at than many civil organisations - e.g. £61 per (log book) hour including FI and fuel for a VOR/NDB/ILS/DME/GPS-equipped Cherokee 140 at a certain club of my acquaintance......