Where do I get authoritative advice from the UK tax office ?
A. From the Inland Revenue in Bootle, Merseyside: (0)151-472-6000 who will then refer you to your local tax office. Neither have ever heard of JRC visiting scientists and have no idea whether their rules for commission employees apply to you. Issues of this type are never properly answered by phone. Instead you must write to your local IR tax officer for a written reply to specific questions. Look in the UK phone book for the address. Allow 3 weeks for a reply.