Book your travel test package before arrival in the UK. You must take a COVID-19 test on or before Day 2 for variant surveillance to check that you do not have COVID-19. The package includes 1 RT-PCR tests that you will receive at home. You will need to carefully follow the instructions of the self-swab and return your kits straight after using them. The Day 2 test must be done on or before Day 2 of your self-isolation; Please note that. Once your test comes as negative you can stop your self-isolation.