Take a break after your flight without worrying about transportation to central London: Jump on the Gatwick Airport Train (run by Thameslink). With these pre-booked tickets your journey becomes much more relaxing, as you avoid standing in long lines to the ticket machines - instead you can board the train immediately.
The train leaves from South Terminal at Gatwick Airport. If you land at the North Terminal, there is a shuttle you can take to the South Terminal.
The Gatwick Airport Train stops at London Bridge, London Blackfriars, City Thameslink, Farringdon and London St Pancras International. It takes around an hour to reach London St. Pancras International.
From the stations you can hop on a bus or take the tube to your end-destination, such as Piccadilly Circus, Trafalgar Square, Oxford Circus, Covent Garden, Russel Square, Kensington, Bayswater or Paddington.