Its all a bit vague but to me it reads like this

After five years, what remains of the loan will attract interest at 1.75 per cent per year. The rate will increase each year by 1 per cent above inflation.

So 10 years into your mortgage you will be paying 6.75% on the 20% and 15 years in it will be 11.75%.

Posted By: MIKEWALKER, Oct 8, 16:03:55