text: **Optional tests**
  
  **4.**—(1) This paragraph applies where P— 
  
  (a) is a non-Schedule 11 passenger who is required to comply with regulation 9, and 
  (b) undertakes a day 2 test which generates a negative or inconclusive result. 
  
  (2) P may undertake a test in accordance with Schedule 10 (optional testing after arrival in 
  England), and, where the test generates a negative result, P ceases to be required to self-isolate 
  from the time that P is notified of that result. 
  
  (3) P must in any event undertake the day 8 test booked in accordance with regulation 6. 
  (4) Where P ceases to be required to self-isolate under these Regulations in accordance with 
  
  regulation 9(16), paragraph 3(1), (4) and (5) do not apply in relation to P’s day 8 test. 
  
  **Tests other than in accordance with these Regulations**
  
  **5.**—(1) This paragraph applies where— 
  (a) P is a non-Schedule 11 passenger; 
  (b) P undertakes a day 2 test which generates a negative result; 
  (c) while P is self-isolating under these Regulations, P subsequently undertakes a test other 
  
  than in accordance with these Regulations; and 
  (d) P is notified that such test generates a positive result. 