Trains
Eurostar http://www.eurostar.com/
National Rail http://www.nationalrail.co.uk/

Transport for London
Main web site http://www.tfl.gov.uk/tfl/
Journey planner http://journeyplanner.tfl.gov.uk/user/XSLT_TRIP_REQUEST2?language=en

Visit London web site http://www.visitlondon.com/