Peek into the secret world of London's transport London Transport Museum is opening up its museum depot to give the public a rare chance to peek into London's past. The museum's reserve collection, housed in west London, is made up of more than 4,000 items including trolley buses, trams, rare signs and posters and even a section of a spiral escalator. Head of Trading at London Transport Museum, Michael Walton, describes the depot as a "treasure trove of London's history," The depot is open to the public from the 1st to 3rd November 2013.