Herod beat me too it. When I was at Shawbury in the late 60s, most traffic was UBAS/8AEF Chipmunks, and Marshall's Vampires and Piston Provosts that were providing targets for ATC students, There were also the occasional Valley Hunters and Gnats doing practice diversions and sometimes we would get Tern Hill Whirlwinds that would come over for a PAR. Reputedly they would occasionally come to a hover and then climb back out along the glideslope, much to the consternation of the radar students!