From April 2016, the Government introduced a new flat-rate pension. As a member of the AA Pension Scheme prior to April 2016 you were contracted out of the State Earnings Related Pension Scheme (SERPS), for service prior to April 2002 and the Second State Pension (S2P) for service after April 2002 but before April 2016.
Therefore, you may not receive the full level of the new State Pension. Further information on the new State Pension can be found at www.gov.uk/new-state-pension