If you have been in close contact with someone who has tested positive for COVID-19, you should not book a symptom-free test. You must stay at home and complete 10 days self-isolation after the day of the test. Taking a symptom-free test will not allow you to end your isolation early. It’s a legal requirement to self-isolate if you are told to self-isolate by NHS Test and Trace. You could be fined if you do not self-isolate.