We do at the moment because we're in a position where we can without changing our lives in any way. We pay an extra 10% per month. Our mortgage is from 2018, so I'd call it a very high mortgage!
If we keep the same repayments, at our current interest rate we should be down to less than 10 grand interest being charged per year in 2025. And we should have her paid off in 2044.
I'm an accountant. I know that a mortgage is the cheapest money you'll ever get. I know that putting it into a pension is probably the sensible financial decision. However, the idea of clearing your mortgage early is nice. Being mortgage free in my 50s would be great.