These are the criteria you should use. Don't make a decision based on interest rate alone.
Mortgages - UK interest rates are current at a 30-year low. Lenders are discounting their rates and offering special deals.
There are several additional costs that should be taken into consideration:
Estate agents fees: 1.5 to 1.75% of the eventual selling price. Solicitor's fees: A few hundred pounds. Stamp duty: Payable on properties over £60,000 – 1% being payable in tax, rising to 3% for properties of £250,000 or more. Removal Fees: You may decide to hire a van, or good removal firm will cost a couple of hundred pounds depending on the distance you are moving.
Mortgages - UK companies are constantly trying to get the biggest market share. Only so many mortgages are taken out in the UK each day. When a mortgage company starts to lose its market share it approaches independent consultants with better interest rate and deals. You would not really be aware of this as it is changing constantly. Use an independent mortgages UK agent to find these products for you.