Efficient service for rapid lateral flow test, arrived by post in 36 hours. Certificates emailed to us well within 12 hours of testing. Everything worked well and we passed through border control with no issues, to our Christmas destination. Will probably use again for our PCR test on our return. My only issue is the cost of these tests. You'd think they would at least offer a discount for a family of four. Hence 4 stars rather than 5.