Trains help?

Can anyone tell me the cheApest site I will get tickets to London on for next Saturday?

No such thing as a cheap train ticket, especially with only 7 days before you travel.

More specifically there's no such thing as a 'cheap site'. Just third party retailers who use marketing to make out like there is.

As poster notes above though the chances of you getting a cheap ticket by now are quite slim. But it all depends on what tickets are left and available in the system, the system which all ticket retailers, including your local station, use. If there is a station with a ticket office near you then try and get there tomorrow and see what they can offer.