At the very end of the film, the town band strikes up the Col. Bogey March. Five years later, the same piece of music would become better known as the theme from the Alec Guinness movie "Bridge on the river Kwai."
The tune played during the parade at the end of the movie is the "Colonel Bogey March", which was used prominently in another Alec Guinness film, The Bridge on the River Kwai (1957).
Editing: In the parade at the end of the film, the star footballer signed by Machin (who doesn't yet appear in the cast credits) winks at the grandees during the march past in long shot followed second later by the close-up of the same action.