I think that your only option is to discuss the position with the mortgage lenders. Your agreement with them probably places a 'joint and several' liability for payment upon you and your former girlfriend. This means that, if any money is owed, the lenders can choose whether to pursue you both for the debt or simply pursue whichever one of you they think is most likely to be able to pay the full amount. This 'joint and several' lability cannot be removed without the consent of the lender so you have no alternative other than to approach the bank or building society.
Sorry!
Chris



