Pel tubular steel stacking chairs in Carry On

spotted in Carry On Behind (1975) used as part of a sketch set in a caravan park club house and painted in 'leaf-green' before guests get stuck to them. four legged (not sledge) thicker that normal tube with painted plywood seat and backrest, thought to be DU-AL or Shepard models rather than Pel or Cox. also appears in the film with a bright red frame. i'm still trying to collect any film and tv references of pel chairs - if anyone spots them please email me, thanks.