I am trying to fix my interest rate (at the rate pre all these latest increases) and the bank sent me out the loan document with the rate 1% less than it should have been. I signed the document off and sent it back. To me, that is a written offer and I have signed and accepted that offer. The bank has detected this "error" and tell me I have to sign a new document (mind you the new set of documents they sent out are STILL incorrect, this time in their favour - useless!). Can someone tell me if what I have signed is a legally binding contract and does the bank have to honour the low interest rate? My argument was that if the interest rate was in their favor and I signed it, they would tell me it was my fault for not reading it properly but they tell me that neither the customer or the bank can benefit from a typo. Can someone tell me if the bank is obliged to honour the low rate and is it worth me taking to the ombudsman?