In reply to streapadair:
If wondered about the bit just west of Charing Cross too, but the theoretical 'mansions' roof line doesn't fit, plus it also appears to be looking slightly downhill in that scene. Had also wondered about somewhere round about the St Vincent Street / Renfield St, but having the big building at the end of the vista doesn't tie in with that option.
St Enoch Station/ Hotel might work maybe? Not familiar enough with what that building looked like.
JimC:
Cheers for the links - will check them out.
I'm also going to print off a still from the clip and have a wander round the southern part of the City centre. I found a site with the old tram routes marked on it so that should help. Will keep this post informed ....and keep the suggestions coming!