Transport in London runs 24 hours a day. The London Underground - The Tube opens at 6am and the last trains to most destinations are at 12 midnight. Many London Night Buses pass through Trafalgar Square and serve theatres, cinemas and entertainment areas. Night buses treat all stops as a request stop. This means that you always have to ring the bell to get off a Night Bus at any bus stop. www.londontransport.co.uk