Who needs to comply?
It is currently understood that anyone working in the above industry sectors must comply with the Sanctions legislation.
The fact is, it is possible for anyone to actually breach the Statutory Instrument or the EC legislation and the HM Treasury states that these laws apply to anyone in the UK.
Furthermore other countries and jurisdictions have very similar legislation created as a result of UN sanctions orders, so there appears to be no exemptions for anyone anywhere.
NB This list MAY NOT be exhaustive so if in doubt, you are advised to check with your relevant regulatory body.