Has your sub actually expired?
When you log into your account, does it show you are now a registered guest?
Was your account a .co.uk one?
I've just tried it out with a registered guest account that satisfies all the above criteria, stayed logged in, clicked the link Sandra posted and the offer does come up. I clicked the option I wanted (£89.99 for a 12 month world wide sub) and it took me through to a payment screen for that amount. I don't want it, so canceled out of the screen but 'would' have been able to continue and pay that price.
Boo