I was going to say definitely shop around. I saw the last answer and funnily enough, I am also with IF, having gone there about six months after they started. I certainly have no complaints about them, specifically because like you, I have an interest only mortgage, and in my case it is pointless changing to a repayment, because I have been paying the endowments for so long. As with may others, I'm due for a shortfall, but IF allows you to overpay your mortgage, and they have been quite flexible about converting part of the mortgage to capital/interest, so whilst I can't afford to change the whole mortgage, I am able (hopefully) to make up the shortfall with no real effort.