The whole set up was hopeless!!! My test was 5day test Saturday . It did not have a contract for postal delivery except "usually 48hrs but contract was upto 10days. After 48 hrs it had not moved from Sheffield. I phoned Royal Mail every day from Monday to Thursday and the lab every day from Tuesday! The sample didn't arrive until Wednesday and the result only became available Thursday evening after I had phoned the lab to check if had been received and tested!! THAT WAS THE 9TH DAY OF MY QUARANTINE!!!. I had the 8th day test on the Wednesday!! The test was only valid for 8 days. It was a waste of money!! You should have a guaranteed delivery system of maximum 48hrs!! I will not be recommending your company. Extremely disappointed and frustrated and both Royal Mail and your Lab were unable to help me when I phone, both saying it was nothing to do with them but the other party! I don't expect anyone to read this message but would like a response!!!!