The trolleybus is Glasgow Corporation Transport TB4, B standing for the chassis manufacturer B.U.T, British United Traction, with bodywork by Metropolitan Cammell,. B.U.T. was a joint AEC and Leyland trolleybus manufacturing concern. This is one of the first batch to enter service on line 102 in 1949.
For further reading on Glasgow's short lived trolleybus network you may refer to this website:
www.glasgowhistory.com/glasgo... My collection of model buses obviously includes various Scottish operators.
‪@MegaBreadvan‬