Leyland600:
BUT trolleybuses with either Weymann or Crossley bodies.
More likely to be Metro-Cammell as they built most of the Glasgow fleet prior to 1955. Crossley started supplying Glasgow from 1957 onwards.
Edit: Did a bit of digging and found an excellent site if anyone is interested in Glasgow trolleybuses trolleybus.co.uk/tbusnet.htm
It would seem that it is indeed a Weymann body delivered in 1953 but the chassis is a Sunbeam not B.U.T. Part of a batch of 20 with the bodies being split between Alexander’s (fleet no’s TG1-5 - the only trolleybus bodies that they ever built it seems) and Weymann (fleet no’s TG6-20) with the G standing for Guy Motors. The lack of white stripe in the lower panels identifies it as a Weymann so well done Leyland 600.