A bit late maybe but here's my experience - I've a fixed rate mortgage with UB with a set amount over-paid each month. I set the over-payment amount via the website and this defaults to maintaining the term. I assume the monthly amount due will be recalculated at some stage (maybe end of the fixed term or one of the triggers mentioned above).
I have also paid off a lump sum by doing a electronic transfer (rang them for the details). Again this defaults to maintaining the term and immediately (well a few days later) the monthly amount due is recalculated. If you want to reduce the term instead you have to send in a letter to UB saying so. A few weeks after the lump sum over-payment I received a confirmation letter.
Also I was told the 10% over payment limit is per calendar year and not per mortgage year.
I have also paid off a lump sum by doing a electronic transfer (rang them for the details). Again this defaults to maintaining the term and immediately (well a few days later) the monthly amount due is recalculated. If you want to reduce the term instead you have to send in a letter to UB saying so. A few weeks after the lump sum over-payment I received a confirmation letter.
Also I was told the 10% over payment limit is per calendar year and not per mortgage year.