Think you need to call ticket office and they can create one. Seems its general sale which does surprise me slightly, though of course we don't know what this game will mean
Thanks - that's really helpful. I've been able to get one other ticket so it's just the 6 year old that won't be able to come. If the game is moved to an evening there'll be no problems! Otherwise, I may need to buy some Lego to compensate. The process to create a new fan number is to logout of the ticket site, create the order and create a new account (can use same address and debit card)