Seems to be him, of the others Captain Hargreaves ended up in Colditz Captain Trayhorn was a Signals officer captured in Albania Captain Jeffries may be Ivan Jeffries Col Stirling is probably David Sirling of the SAS who also ended up in Colditz
I beleive Captain Jefferies was Ivan Jefferies as he was my fathers cousin and it seems to fit with my fathers recollections from talking to ivan after his release