Kensington Mortgages is offering a three-year fixed-rate mortgage for adverse-credit clients. It says it is the first specialist lender to offer such a deal. Rates on the mortgage start at 5.75 per cent and are fixed until November 30, 2006. There are no early repayment charges after the first three years. Kensington has extended the end dates for its one-year fixed and discounted interest rates which start from 3.9 per cent until November 30, 2004.