text: **30.**A postal operator, as defined in section 27(3) of the Postal Services Act 2011(**d**), where they 
  
  have travelled to the United Kingdom in the course of their work. 
  
  **31.**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 they have travelled to the United Kingdom in the course of their 
  work or otherwise to commence or resume their work. 
  
  **32.**A worker with specialist technical skills, where those specialist technical skills are required 
  installation, 
  for essential or emergency works (including construction, commissioning, 
  maintenance, repairs and safety checks) or to fulfil contractual obligations or warranty 
  specifications in, or in connection with, waste management facilities used for the management, 
  sorting, treatment, recovery, or disposal of waste (including energy from waste), where they have 
  travelled to the United Kingdom in the course of their work. 