The staircase where Batman escapes the SWAT team using bats was filmed in St Pancras Chambers at St Pancras Station.
Nineteen years later, the gang and their young kids head to the train station for their first years at Hogwarts.
Source: The Worldwide Guide to Movie Locations
Harry and Ron steal Ron's dad's car after being left behind by the Hogwarts Express.
Brad tries to call out all of the madness surrounding Peter and the trip when the class arrives in London but MJ is able to expertly shut him down.