HMRC have updated their guidance on “officials and other servants of the European Union”.
https://www.gov.uk/hmrc-internal-manuals/international-manual/intm860820
Related content from Claritax Books
Advising British Expats is a detailed guide to the tax issues arising for individuals who leave the UK to live and work abroad. Written for accountants and other professional tax advisers, the book also includes commentary on individuals coming to work in the UK.