text: **45.**—(1) A person who has travelled to the United Kingdom for the purposes of essential work 
  
  carried out for or on behalf of the nominated undertaker. 
  
  (2) For the purposes of sub-paragraph (1)— 
  
  (a) “essential work” means work which has been designated as such by the Secretary of State 
  for Transport and includes, in particular, work done or required for Phase One purposes 
  as defined in section 67 of the High Speed Rail (London-West Midlands) Act 2017(**a**); 
  (b) “nominated undertaker” is the person appointed by article 2(1) of the High Speed Rail 
  
  (London-West Midlands) (Nomination) Order 2017(**b**). 