
Originally Posted by
asiamiles
No, the game on TV was surely Celtic. There was never football on TV on Saturday afternoon anyway, so there was really no striving for realism here
I have finally identified this match as the 1969 Scottish Cup Final between Celtic and Rangers, which, incidentally, was Alex Ferguson's last game for the team in blue. It took a long time to figure this out because the commentary is fake ("Wilson has scored!") and the goals are actually in the wrong order.
In the film, viewers see Celtic's No.7 go round the goalkeeper and score:
Jimmy Johnstone usually wore 7 but it's not him. He was suspended. This is George Connelly, who was 19 at the time.
We're led to believe the scorer of Celtic's third goal is the same player who goes to celebrate in front of ecstatic fans:

In fact, the player with his arms aloft is Bobby Lennox (hopefully you can make out No. 10 on his shorts), but he scored the second! What's happened here is that the action has switched from original film footage, as illustrated in my first capture, to a TV screen showing the same match - the second image. No. 3 is Willie Mathieson and the goalkeeper is Norrie Martin.
I very much doubt anyone making the film made the hoops/QPR connection. The blue and white scarves worn by the pub goers could have belonged to QPR, Chelsea or Milwall fans.
More likely to be Queen's Park Rangers as one of the customers says that "Rodney should have passed ...". That can only mean Rodney Marsh, a QPR player at the time (this was filmed in the Summer of 1971). Also having a pint at that table was prolific extra George Hilsdon.