[Jonesy55]

Booking in advance does make a huge difference, many European operators have variable fares but in the UK the differences can be especially big.

Just looking at tickets from London to Leeds (190 miles / 305km, journey takes just over two hours)

Turn up now to travel this afternoon and the cheapest single ticket is £109 ($152.50)

Buy now for travel tomorrow afternoon and it's £66 ($92.50).

Buy now for travel next Monday afternoon it's £44 ($61.50)

Buy now for travel on the afternoon of April 18 and it's £29 ($40.50).

Buy now for travel on the afternoon of May 9 and it's £22 ($31)

Buy now for travel on the afternoon of June 21 and it's £16 ($22.50)