28 Days Later

For the London scenes, police would close the roads at 4am, and filming would begin immediately. After 1 hour, the police would reopen the roads. The producers correctly predicted that asking drivers (including clubbers headed home) to either wait for up to an hour or find another route might make some of them angry. They got several extremely attractive young women (including Danny Boyle's daughter) to make the necessary requests, and the drivers responded quite amicably to them.