Owning your own home

Not so much at you, more generally....

From a 'total interest paid over the course of the mortgage' point of view this makes a lot of sense.

BUT - I would be very wary of overpaying as opposed to saving.

£1,000 pcm month mortgage. £6,000 savings set aside purely for mortgage. Job lost. You can pay the mortgage for 6 months.

£1,000 pcm month mortgage. £6,000 overpayments made. Job lost. No guarantee that the bank will give you 6 months grace to thank you for making 6 months overpayment. They might say 'overpayments are in the past. They are irrelevant. YOu have missed 3 months of payments, we're gonna start repossession procedings.'

Check the Ts and Cs.

My provider lets you choose how the overpayments work (reduce term or something else) and you can 'get them back' so to speak if you need help.