Even if the state pension will not be received by any of us now well past 65 it is likely to be considered by most of us as important so knowing what your likely entitlement is a very good step. And it is really easy to find out, no more pages of questions just set up your personal tax account. Go to https://www.gov.uk/personal-tax-account
This prompts you to set up a Government Gateway account first so have with you the following before you start:
Through the personal tax account you can access your National insurance record and obtain a state pension forecast.
If you have any questions ring the Helpline 03456080126
If you contracted out of SERPS this can be checked via a phone call to 03002003507 to the National Insurance Services to Pensions Industry (NISPI) see also https://www.gov.uk/government/organisations/hm-revenue-customs/contact/pensions-helpline-contracted-out.