If you are arriving to the UK from a ‘green list’ country you are required to only have a Day 2 Test.

If you are arriving to the UK from an ‘amber list’ country you are required to have a test on or before Day 2 of your self-isolation period, and then another test on or after Day 8. You must also quarantine for 10 days.

It is your responsibility to check what zone your country of departure is in. You can check by clicking here.