Hmm, if that's true, then they certainly don't make it clear... I don't have a direct debit setup to pay of my plat charge card. Looking at the first page of statement which was issued a couple of days ago:
Date - 26/11/13
Next Statement Date - 25/12/13
Payment Due Date - 9 December 2013
Thank you for using our service. Please make sure your payment of £#### reaches us by 9/12/2013.
And yet on the last page, we see
Interest Free Period - Interest is not charged as all outstanding balances must be repaid in full each month on this product.
Minimum Repayment - The outstanding balance must be repaid in full each month.
I wonder if it's worth an email to them to confirm it?