There aren’t any loop holes, people just lie. In the same way under 18 yr olds try to get served in pubs, no ID no service, unless it’s obvious their over 18. Same rule can be applied by Todd as the manager of the IAW, if he suspects people are flouting the law, he can remove them from the premises. Simple. It’s not that difficult, the statistical chances a group of non mask wearers, under 30 all having mask issues is zero. The statistical chances their full of sh88 very high.
The very least all employees legally must wear a mask unless excempt.
Welsh Government guidelines below....
“Ultimately, the operator, an employee or a person authorised by the operator are not expected to take enforcement action. However, as outlined above, they have a role in explaining what the requirements are, and encouraging visitors and customers to comply with the regulations and wear face coverings. Managers of premises have a general right to refuse entry if circumstances necessitate it, and they can call the police to report issues of antisocial behaviour”.