Early Repayment Charge
This is a charge made by your mortgage lender, which is payable on certain types of loan - usually discount ed or fixed interest rate loans. The charge is only applied if the loan is redeemed or part-redeemed within the specified early repayment charge period.
This is the downside of benefiting from the certainty conferred by fixed rates or the cheaper mortgage offered by discounted rates.
Some lenders lock you in to a three or six month repayment charge - you've been warned, if someone is offering you an incredibly good interest rate below the rate prevailing on variable rate mortgages, the chances are they want something - your loyalty, and that could mean it'll cost you if you decide to move lender in future.