Just found this on the HSE site
The selection and use of HV clothing are covered by the Personal Protective Equipment at Work Regulations 1992. In practice, this means that HV clothing will be mandatory for the majority of people whose work involves them spending time in or around aircraft. Workers in this category will include aircraft marshallers, loaders, baggage handlers, and refuelling engineers. Occasional visitors to these areas, such as the flight crew performing pre-flight checks, security staff, supervisors and managers, will also need to be considered.
