text: (5) Sub-paragraph (6) applies where P is a person of the description in regulation 5(1)(b), (c) or 
  (d) and P fails to undertake a day 8 test. 
  
  (6) Where this sub-paragraph applies, P must self-isolate in accordance with regulation 2 of the 
  Self-Isolation Regulations as if P had been notified under regulation 2A(1)(a) of those 
  Regulations, on the date that P should have undertaken the day 8 test, that P had tested positive, 
  until the earlier of— 
  
  (a) the end of the 14th day after the day P arrived in England; or 
  (b) the time that P is notified of the result of a test meeting the requirements of day 8 test 
  
  save as to the time at which the test is undertaken, that P has undertaken. 
  
  (7) If the result notified to P of a test of the description in sub-paragraph (4)(b) or (6)(b) is a 
  positive result, P must self-isolate in accordance with regulation 2 of the Self-Isolation 
  Regulations until the end of the 10th day after the day P arrived in England. 
  
  (8) Where P undertakes a test to which paragraph 3(7)(b) applies and which generates— 
  
  (a) a positive result, paragraph 3(1) applies as if the test were a mandatory test; 
  (b) a negative result, paragraph 3(4) applies as if— 
  
  (i) P had taken both a day 2 test and a day 8 test, and 
  (ii) both tests had generated a negative result. 