1999. The depot holds the majority of the museum's collections which are not on display in the main museum in Covent Garden. It is the base for the museum's curators and conservators, and is used for the display of items too large to be accommodated in the main facility. The depot provides 6,000 square metres of storage space in secure, environmentally controlled conditions and houses over 370,000 items of all types, including many original works of art used for the museum's collections of posters, signs, models, photographs, engineering drawings and uniforms. The building has both road access and a rail connection to the London Underground network, which allows the storage and display of significant numbers of buses, trams, trolleybuses, rail rolling stock and other vehicles. The depot is not regularly open to the public, but is fully equipped to receive visitors, with ticket office, shop, a miniature railway, and other visitor facilities. It opens to the public for pre-booked guided tours on several dates each month, and also for special events, including themed open weekends – usually three times per year. It is within easy walking distance of Acton Town Underground station. Transport links See also List of British heritage and private railways List of transport museums (worldwide) Island Line (Isle of Wight) – operates former London Underground trains in regular public service Other transport museums with items from London Transport: London Bus Museum, Weybridge Alderney Railway – on the Island of Alderney East Anglia Transport Museum – near Lowestoft National Railway Museum – York National Tramway Museum – Crich The Trolleybus Museum at Sandtoft – in North Lincolnshire Other transport and industrial museums in London: Brunel Museum Kew Bridge Steam Museum London Canal Museum London Motorcycle Museum Science Museum (London) Walthamstow Pump House Museum Other major transport museums in the UK: Black Country Living Museum Riverside Museum, Glasgow Museum of Transport in Manchester Ulster Folk and Transport Museum Coventry Transport Museum Past transport museums in the UK: North Woolwich Old Station Museum References External links Resource showing the entire collections on display at the Covent Garden site Explore over 5,000 posters and 700 original poster artworks from the Museums collections Explore the online photographic collection of over 16,000 photographs Transport museums in London City museums in the United Kingdom History museums in London Railway museums in England Bus museums in England Museums in the City of Westminster History of