A: There are no NHS rules or guidance. GP partnerships are independent businesses, with their own internal arrangements.
Delays to parity are based on the assumption that a new partner would take time to build up a list and develop the expertise to fully contribute to the practice, but they are no longer common. The requirements are derived from the law of contract not NHS regulations.
The partnership might consider whether a perception of unfair treatment is the best foundation for an enduring relationship, especially as one reason for delay to parity has disappeared with abolition of personal lists. It remains, however, a matter for negotiation, not legislation.