Instructions:GNER have launched a new Christmas promo which allows you to book tickets at less than their usual cheapest fares. For example, London to Edinburgh (single) is £11.50 instead of £14.05. More examples include:
London to Leeds £10 one way
Peterborough to York £8 one way
Doncaster to Newcastle £6 one way
York to Glasgow £8 one way
The available travel period is from 03 January until 11 March 2007 (with exclusions). The booking period is from today until 30 December. To obtain the discounts you book tickets via the website linked with this deal, and then also have to print out a 'token' to present on the train with your ticket.