UB told me this rate also doesn't require you to change any current accounts to them - so could save some hassle there also if not wanting to change current account. Also at end of 4 year term you can change to any rate they have on offer (SVR or even their discounted SVR once you meet the conditions - e.g. change current account to them, LTV ratio etc..). Also confirmed about changing LTV bands is possible after a re-valuation - mentioned they typically have 3 LTV bands.