London has one of the most comprehensive public transport systems in the world. Despite residents’ constant, and sometimes justified, grumbling about unreliability, public transport is often the best option for getting anywhere for visitors and residents alike. Before you make a start check your map.
Transport for London (TfL) is a government organisation responsible for all public transport. Their website contains maps plus an excellent journey planner. They also offer a 24-hour travel information line, charged at premium rate: ☎ 0843 222 1234 (or text 60835) for suggestions on getting from A to B, and for up to the minute information on how services are running. Fortunately for visitors (and indeed residents) there is a single ticketing system, Oyster, which enables travellers to switch between modes of transport on one ticket.
All further useful information and tips at Wikitravel.
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