i have worked as an employee for almost 50 years. National Insurance contributions were automatically taken. At age 16 i was informed by my first employer that these payments included a contribution to secure a state pension. No agreement was ever produced or signed to state what i would receive or at what age. i am now in receipt of the UK state pension. Can those NI contributions be considered as having been voluntary contributions from the property of i, as a loan to the estate of I, and if so do i have a case for not being taxed on the return of my property from said estate?