JohnD. i pay £60 a month over 20 years into a private pension, in 10 years i am told it should be worth £110 plus, a week

i hope, would it be worth topping up say by 7000k
It used to be said that you should pay 10% of your earnings into your pension for 40 years to receive a decent pension. However many of us are noe having shorter working lives and longer retirements, so you need more
if you have £7,000 to spare, ask yourself are you likely to need it before (1) you retire or (2) you are aged 50. Also (3) are you a higher-rate taxpayer.
If thge answer to (1) is no, and (3) is yes, putting it into a pension is likely to be a good move.
This is because, as a higher-rate taxpeyer, £7,000 out of your pocket will be grossed up to £11,666 in your pension fund (since income tax paid on your earnings is reclaimed). If you have your own company, and the company makes the payments, it also saves employers NI since the money is not paid to you as wages.
If the answer to (1) is yes and (2) is yes and (3) is no, consider what you can afford to lock away. In any case put the rest of it into an ISA to protect it from tax.
My preference is to put pension contributions, after putting the max into any company scheme, into a low-cost SIPP; then you need have no commission to pay, no penalty charges, and can start drawing from it at whim anytime after your 50th birthday (this age will increase in future)