For arrivals from Green List countries, and for fully vaccinated UK residents and fully vaccinated from Amber List countries. Test on or before day 2 of arrival. Always check the Gov UK website for the most up to date information. Home tests , or at our clinics (Slough and Rotherham). Laboratory certificate. Results within 24 hours of lab receipt. You must follow the link on your order confirmation email to provide additional travel information. Once you do your home test follow the instructions to register your test by email.