Pure (2002, Harry Eden, Molly Parker, Keira Knightley et al)

Grim East London-set drama. As the opening credits are displayed, Paul (Eden) cycles past Stagecoach London's West Ham garage, where two Dennis Tridents are parked:
He also avoids getting on the school bus - it's Plaxton bodied, but not identifiable from this:
Before she starred in 'Deadwood', 'House of Cards' and 'Goliath', Molly Parker played Paul's mother, a heroin addict, and she and her family travel on Redroute's B229WUL, a MCW Metrobus formerly London Buses M1229. I'm open to offers on the green saloon passing in the other direction: