In the UK, for British citizens or individuals with indefinite leave to remain there is not a specific expiration date when personal checks expire. Once a person has proven their Right to Work, it generally remains valid unless their immigration status changes.
However, for individuals with the type of visas that are time-limited  or immigration permissions, their Right to Work may be tied to the validity of their visa. In such cases, the Right to Work would expire when the visa or residence permit expires.
It’s essential to stay up to date with the latest immigration regulations and guidelines, as rules and requirements can change over time. Employers and individuals should regularly verify the status of their Right to Work