It can be accessed via the National Rail journey planner page or sites selling rail tickets will include a version because they need to know when you are travelling to sell you the right ticket.
An alternative is the German railway timetable system which includes most UK routes and is quite friendly.
It offers facilities which you may not find on UK sites such as listing all the stations at which the train will call and all trains leaving a particular station but may not contain late changes for engineering works.
Transport Direct is a non-profit service is funded by the UK Department for Transport, the Welsh Assembly Government and the Scottish Executive. It offers journey planning for most types of transport but sometimes produces unexpected results! One feature I do like is the facility to identify and map individual bus stops.
The Traveline Scotland site covers most of the UK, despite its name, though the choice of destinations is more limited outside Scotland. It appears to give more reliable results and includes information like catering facilities and train reporting numbers.
It is also available by post (with an additional charge for postage & packing) from:
6 Chessingham Park
Telephone: 01904 481140
International: +44 1904 481140
Fax: 01904 488572
International: +44 1904 488572
The variety of tickets issued in the UK continues to grow and can be rather confusing. For example a recent check on fares from London to Blackpool produced a range from GBP 12.50 per person to GBP 239.40!
The guide on the First Great Western site gives a brief description of most of the long distance ones.
You can now buy tickets on-line at thetrainline.com or from most of the Train Operating Companies listed here.
In the London area, the Travelcard combines travel on Rail, Underground and busses. The Travelcard is available for travel from most stations in South East England and the off-peak One Day Travelcard is a good way of visiting London.
This page on the National Rail site currently (September 2005) gives some information but may move or disappear.