The museum holds a sizeable collection, including around 80 buses, of which 70 or so are kept on the site, one of the largest collections of its kind in the United Kingdom. Due to the size of the building, some vehicles have to be kept off-site, with exhibits changed around every so often. In addition, vehicles often attend events around the country in the summer months. The museum collection is constantly developing and
restoration work can often be seen by visitors. Also in the collection are two
trolleybuses from
Manchester and
Ashton-under-Lyne corporations, and the prototype body
Manchester Metrolink tram. In addition to vehicle exhibits, the collection of objects includes old transport signs, uniforms, vehicle fittings, ticketing equipment, and several items used by
Warner Bros. during the filming of
Harry Potter and the Prisoner of Azkaban. The extensive archive collection is available for research purposes by appointment and includes historic timetables, maps, books, posters, manuals and plans. The museum also holds a photographic archive collection, much of which is available online via the GMTS account on
Flickr.com. ==Events==