Got this online from the HMRC site the full info though is in pdf format.
Basic State Pension
State Pension is paid in two parts.
- Basic Pension, paid at a flat rate
- Additional State Pension paid on the basis of your earnings before your retirement.
The Basic Pension is a flat rate benefit based on the number of years (known as qualifying years) in which you paid or were credited with a minimum amount of standard rate contributions. (Class1, 2 or 3 NI Contributions)
Further information can be found
The Pension Service Website.