I checked this web site http://www.thetrainline.com/ for tickets, and found that it costs us £251.60 for two people to travel from London King's Cross station to Edinburgh's Waverley station at 10am on 6 Aug 2014. On the web site, it is stated that cheaper advance tickets will be available 12 weeks before the travel date.
At http://www.eastcoast.co.uk/, tickets are only available for travel dates which are not later than 12 weeks from today.
So should we wait until 12 weeks before 6 Aug 2014 before I book our tickets?
Is the a web site where I can buy tickets for any train company?
Thanks in advance.