Book a rail pass from a travel agency before your departure, which will depend on your travel plans. Buy the pass based on how long you plan to stay in England and how many times you plan to use rail travel as a mode of transportation.
Purchase tickets at the train station if you do not have a train pass. Make sure to do it as soon as possible, to avoid tickets being sold out.
Check if you need to buy an additional ticket on top of your rail pass. Go online to the National Rail website and check the ticket requirements for each trip.
Book your ticket at night in a sleeper car if you are traveling for a long distance. This also saves money on lodging for that night.
Make sure to double-check the train timetable that you may have received with your rail pass with the actual departure board at the station. Trains get delayed all the time, so make sure you have the most current information.
Make sure to mention at the station's ticket desk if anyone in your party is disabled, to make sure that the proper accommodations are made. Disabled people are eligible for rail discounts.
Use a train to travel from major airports like Heathrow to the city, instead of taking a taxi or a private pick-up service, since it is usually much cheaper. Trains often make several stops within a city, before moving onto their next destination.