If you're within a decent period of retirement (10 years), I think the best thing to do is bury any overpay in to a SIPP, take the 20% uplift (tax rebate) and then pay off the mortgage with the 25% tax free drawdown. Ezy gainz.
you get tax money back from the gov when you pay in to a pension. Instant 20% gain versus any other investment. Wait until 55, take 25% out tax free and pay mortgage off with the lump.
If you're within a decent period of retirement (10 years), I think the best thing to do is bury any overpay in to a SIPP, take the 20% uplift (tax rebate) and then pay off the mortgage with the 25% tax free drawdown. Ezy gainz.