Welcome to the forum Mendez.

There are probably two parts to answering your question:

Firstly, there's nothing directly related to being in a trust deed that prevents you from seeking to move to an interest only mortgage. If your existing mortgage lender is happy to do this switch then that's a matter between you and them. Moving to a different lender is very likely to be difficult due to the effect that your debts and trust deed probably have had on your credit rating.

Secondly, if you were successful there might be implications for your trust deed payment. The payment is based upon an affordability calculation which, in the simplest of terms, is your income minus your reasonable expenditure. If your expenditure went down (reduced mortgage cost) and everything else remained the same then your trustee might consider that you can afford to pay more into your trust deed each month.

What's led to you considering making this change?

Thanks for getting back to me regarding this.... was just thinking that I pay £125 on top of what my tenants give me due to buying my house in 2006 (high mortgage) to pay the mortgage.....I'm self employed and am either to busy or not enough work sometimes and just thought that it would help me to reduce the morgage a wee bit so it would be less outgoing in the month
But did wonder if my trust deed would go up right enough

Hi again Mendez.

There's no harm in talking this through with your trustee to see what they say.

Probably best to do that before spending too much time talking to your lender though, in case such a change will not be worthwhile for you.