Interest only overpayments

KEROUAC

I hope this isn't a stupid question. I've always had an interest only mortgage namely because of my financial situation and I've not been able to afford the repayment type. I want to get a new fixed deal and was thinking of adding a loan which I have to my mortgage which might free up enough cashflow for me to afford a repayment mortgage.

Question is what's the difference between me having a repayment mortgage Vs having an interest only mortgage where I just make overpayments assuming I don't pay more than the deal limit which I guess is around 10%? Doesn't this allow more flexibility or am I missing something? Is there a disadvantage to this?

 I feel like I want to speak to a financial advisor as this is just one of my issues but don't know how to find a go

[Deleted User]

All else being equal, the interest only mortgage gives you more flexibility - but also requires more discipline.