As the transport networks grind to a halt at around midnight, the night buses take over. Look for the 'N' sign at the bus stop or on the bus. Most of these buses pass through Trafalgar Square and this is the best place to head. Unfortunately this is also where most of late night London heads, so be patient.
Night buses are more expensive than the usual fare.
24 Hour, seven days a week information: 0845 300 7000