Train travel in the UK was once a dallience of the rich but now with hundreds of trains each day coming in and out of all of London's main train stations, like Kings Cross, Victoria and Waterloo, anyone can get to take advantage of city breaks in London by train.
Train carries form the north-east like East Coast rail and Grand Central usually arrive and depart at Kings Cross Station, a centrally located station with easy access to central London by underground and bus routes. Grand Central Rail runs trains between Sunderland in the north east, stopping at station to York and then runs a direct non-stop route to London Kings Cross. Grand Central rail is currently running a summer offer of one way tockets for only £15 on some trains.
From the south of country, no reservation is needed on services like South West trains who run regular trains into London Waterloo, perfect for business trips of city breaks in London by train. When searching for trains to and from London, Thetrainline.com offers an easy to use search facility which lists all possible journeys by train to and from London and includes all options, with or without changeovers. Trains from the south can be bought on the day. As an example, an on the day ticket from Brighton to London costs £20. Tickets on this route can be found for as little as £5 each way when booked in advance.
After arriving in London, all major train stations have direct access to an underground station with regular departures on one or more underground route.