You are entitled to a full UK state pension if you have 35 years qualifying National Insurance Contributions (NIC) or credits when not ‘working’ e.g., home responsibilities protection for childcare (you/your partner must be in receipt of child benefit) or looking after someone for 35 hrs per week with long term disability or illness (the person you are caring for must be in receipt of attendance allowance, disability living allowance {middle or highest rate for personal care} or constant attendance allowance.
Full UK State Pension for tax year 2023/24 is £203.85 per week (£815.40 every 4 weeks) and for 2024/25 it is £221.20 per week (£884.80 every 4 weeks).
Why Is My State Pension Lower Than the Full State Pension?
Why is My State Pension Higher Than the Full State Pension?
If you are not sure, you should read your old workplace or personal pension documentation and look for terms like ‘contracted out’ or ‘guaranteed minimum pension GMP’ or even ‘protected rights’, as this will indicate that you were contracted out of SERPS and/or S2P. You should also check with the DWP.