How do I find out if my state pension is right? Years are missing from my record: STEVE WEBB replies

If my NI record shows 'no full years' from 1979 to 1996 how can my pension be correct? I have queried this many times with ...
Which

Pension calculation

Your Final Salary Pension is calculated from the salary you were being paid by Which? when you left the Scheme (1) and your length of service in the Scheme. The calculation works out the pension to be ...