moving to a tracker rate - but only if this was offered to you at the time you signed up for the fixed rate. Look at the documentation your lender sent you when you signed up to a fixed rate, as this will detail what your interest rate will revert to after the fixed rate term ends. If a tracker mortgage was one of the options, then your lender must offer you the tracker rate, even if they are no longer widely available. If you do not have the documentation, contact your lender and ask for a copy.