Numerous sources are reporting that the codes that came up as being used before yesterday are now January 26, 10 am GMT working and being accepted. If you didn’t manage to get through yesterday, it may be worth trying again now. We’re hearing reports from people managing GA ticket for Manchester, Twickenham and Cardiff.
Also, codes that were successfully used yesterday have now been reactivated. Please don’t be selfish folks!
UPDATE: It seems people are running into the same problems again, receiving an error after putting in their codes, and having their codes marked “used” yet again.
UPDATE #2: Despite what it says on the entry page, GA tickets for London can (apparently) still be bought by following this link. At your own risk! (People who have booked through this link are receiving confirmation emails as normal)
UPDATE #3: If you’re getting the error saying you must come from http://onsale.ticketmastereurope.com/U2/ you may have more luck after turning off any firewall software you may have. Also, some browsers don’t pass on their referral page, so you’re probably best off using bog standard Internet Explorer.