Low risk investment/s or save cash

AlanP_2

OP, in your situation I would try and cover all the bases and not commit all your cash to one option or the other.

For example you could overpay your mortgage by the 10% a year and put the balance into Pension / Cash Savings / LISA / S&S ISA as appropriate for your needs and what you would feel comfortable with.

It might take you 6/7 years to clear your mortgage that way but you will be building up "compensating" assets along the way. By that I mean if you calculated your Net Worth after 6/7 years either route would come up with broadly the same number.

This is based on the assumption that you could manage the mortgage in the event of job loss / serious illness etc. for a reasonable period at least by making use of CASH emergency savings.

Some people are happy to take risks that others wouldn't consider, you need to work out where you fall on the risk continuum, and where your spouse falls as well, and stay within your "comfort zone".

You aren't in competition with anybody else to make more money, it's what you want to achieve that matters and your wellbeing / quality of life at the end of the day.