UB - paying off capital with IR reductions

I have a Ulster Bank tracker mortgage. In light of the interest rate cuts, has anybody any experience with getting UB to keep the monthly direct debit the same while using the excess payments to reduce the capital balance of the mortgage, i.e. overpaying the mortgage?

I will ring them today, but my previous dealings with them means I have a lack of confidence that they will do it right, especially as I have no visibility of my mortgage account online.

I vaguely remember somebody on here experiencing difficulties in trying to do just this with UB - something along the lines that they offset the excess against future interest payments rather than capital amounts!

Anyone? Thx

Just put it in writing. I have always found them to very good at carrying out my instructions on overpayments etc.

Cool - thx