Sal clearly has never used the word forester before as he pronounces is forster.
The football scene was filmed at Adams Park, home to the Chairboys aka Wycombe Wonderers, a Championship football team.
The pub scene was filmed at the Forester pub in Ealing.
The old man that complains about not being used to prices doesn't realise that drinks in Ealing are actually pretty cheap compared to the rest of London, in central London a pint sometimes costs £10. In Ealing for example, some places offer a pint for a pound.