Pensions
Locums can opt to pension their income or not, useful links for further information.
https://www.nhsbsa.nhs.uk/member-hub/information-practitioners-and-non-gp-providers
https://pcse.england.nhs.uk/help/gp-pensions/locum-a-b-pension-contributions/
Your pension tier is determined by your estimated income in a financial year.
Added years is an additional contract to pay more pension that individuals will have entered into pre 2008 that is no longer available.
https://www.nhsbsa.nhs.uk/member-hub/increasing-your-pension/additional-pension