This SS has not yet been added to the PRA Rulebook. It is available on the Bank of England website, here.

https://www.bankofengland.co.uk/prudential-regulation/publication/2015/strengthening-individual-accountability-in-insurance-ss

Related links

PS11/21 - "Strengthening accountability: Temporary, long-term absences" https://www.bankofengland.co.uk/prudential-regulation/publication/2020/smf-long-term-absences