Pension top ups @ 60yrs old??

I am self employed and have a very small pension 15k approx.
I'm in a position where I can either clear my existing mortgage of 68k over the next 5 yrs or would I be better off to put this into a pension?
As I'm self employed I do not have to retire @ 65 from my job.

Assuming you have taxable income at 42%(+those levies) your pension investment is 'deductible' for tax purposes whereas you are paying the mortgage out of taxed income.

That for me would suggest that you should look to invest rather than extinguish the mortgage ..if you have 'an either or' situation.

Hard to judge with limited information.