The Health Protection (Coronavirus, International Travel) (Wales) Regulations 2020

[F112.  A worker with specialist technical skills, where those specialist technical skills are required for essential or emergency works or services (including commissioning, maintenance and repairs and safety checks) to ensure the continued production, supply, movement, manufacture, storage or preservation of goods, where the worker has travelled to the United Kingdom in the course of their work or otherwise to commence or resume their work.]E+W