We decided to upsize and moved house in September 2018 so got a mortgage after a few years mortgage free. We made the decision to go for a 10 year fixed rate at 2.64% which was more than we'd could have paid on a shorter fixed deal but knowing where you are for the longer term is a bonus and 4 years ago rates were so low there was only really one way they were going to go. Cheap money like that was never going to last (and I'll be surprised if we see again).
So it looks like we made the right call because when our deal comes to the end in 2028 I doubt getting anything less than 5% will be a distant memory, but we're overpaying every month so when the deal ends we hope not owe too much and may even be able to pay it off.
We do also remember the days of 15% and no fixed rate deals so your payments were up and down like something that goes up and down a lot
but you did get tax relieve on the interest on the first £30,000.