Got a letter from Postbank (as a customer), they are running a 0% promotion for Dec & Jan on their overdraft (authorised o/d). Not bad to help out with Xmas spending.
I don't think they're still running the offer but Halifax were offering an overdraft at 0% to the amount of €1,500 for twelve months not so long ago. I know the climate has changed a lot but I'm not sure many would switch to Post Bank for such an offer.