The ticket man told me when I was getting my ticket. When they show the stadium seats on the screen, they use different colours to show what is and isn't available. I asked what one of the colours were for, and he said it was for people that hadn't renewed (we're talking a small percentage of the seats, not as though they'd be DD renewals) yet. He said the deadline had been extended until the 14th (I think).
I'm not 100% sure on the date, as it didn't affect me, but I think he said they had until the 14th. Whether or not that included the 14th, your guess is as good as mine. But ask to look at the stand your interested in, and then ask about the different colours, and they'll tell you what it means. If there are seats that become free at the end of that day, ask exactly what the process has been for them to have not renewed (ie, is it just those without DD who should have called to renew, or is it people that have called and said they don't want to renew, but the seats have been kept available in case they change their mind, or what). If it looks like they won't be renewing, you should be able to do something about putting your name down for a couple.
