Even general public who don’t fall into a “crew” category can still use the final listed exemption- provided they “usually” go overseas to persue “an activity” once per week! This regulation is a complete nonsense (thankfully) just paying lip service to the media.
From gov.uk list of exemptions....
“a person who resides in the UK and who pursues an activity as an employed or self-employed person in another country to which they usually go at least once a week”