Re-fix mortgage or stick with BMR

Kildare

Afternoon!

It's nearly time to get a new deal on our mortgages and I wanted to ask if anyone had advice on the following:

We have two mortgages on our property:

1. 13 years left to run, currently on BMR at 2.5% as when we moved 3.5 years ago it made sense to port this across rather than fix
2. 21 years left to run, new borrowing taken out to move last time. Fixed at 2.49% and due to end in a couple of months. This will move onto the SMR currently at 3.99% if we don't take out a new deal

As better rates are now available to us I know I can fix mortgage 2 at a much better rate than SMR which is what we intend to do.
However for mortgage 1 is there any benefit to keeping it on BMR? We can fix this loan lower than the current 2.5% BMR BUT I know that we will never get the BMR rate back once we take a new deal.

Another question is, we are planning to move somewhere in the next 3-5 years. We are only just starting to give thought to this so no set plans yet. The move will probably involve some further borrowing. Our currently mortgages are with Nationwide and when we re-fix there will be an ERC in place. Does anyone know if Nationwide charge the ERC if you move home but stay with Nationwide (either by porting mortgages or consolidating into new lending)? It's the only thing stopping me going for a 3 or 5 year fix over the 2 year.

Thank you!! :beer: