That looks sensible to me. Does it allow paying down the loan a bit as well?
10% overpayments are allowed, yes. However, it increases my mortgage payments by £900pcm from my current ~2.2% deal, so will have to evaluate how much appetite/bandwidth i have for overpaying right now
I'm locking this in for a March execution, so if anything changes between now and then we just walk away and take the better deal. Feels worth doing!