Just a note as you appear to be with Nationwide (
@uncle_rufus )
When you make overpayments under £500 they do not adjust your monthly payment, its set to trigger at the next logical point. Which for you would be the end of your term of your fixed deal.
This default would put your amount lower but leave the term the same.
If you pay £500 or more you can select what you want to happen. The most flexible of which is to leave the term the same, and the payments the same, but build an overpayment reserve.
I believe the default for this is also to keep the term the same, but to adjust the payments at the next logical point. (which is expiry of deal or a change in interest rates).
Its no biggie right now, but you want to think about the options if you want to pay your mortgage off significantly faster. If so you want to avoid your payments being lowered as that affects the max overpayment you can make, as the cap is linked to the original amount, and if your minimums drop then your overpaying more. Hope that makes sense!