This sale is back for another year with 1 million discounted tickets of up to 50%.
It can be booked between 23 and 29 January – or whenever tickets sell out, for journeys between 30 January and 15 March, excluding already announced strike dates,
The fares, if available, will show up through all normal booking channels, and apply to selected routes and selected journeys only on those routes- so is very much a game of chance.