We've arrived in the UK recently so are taking day 2 & day 8 tests. We skipped the day 5 test because we were buzzed by the NHS to isolate the full 10 days.
The first test was taken and posted on Monday (day 2) before last post, in a local priority box. It was received in Swindon at 9pm on Monday and delivered in Birmingham at 08.25 on Tuesday - pretty good.
But the lab then took forever to process the tests and we only got the result at 16.00 on Thursday (day 5) - so a total of 3 days.
Day 8 test we did on Sunday but there were no priority post boxes I could find within an hour's drive, so I opted to hand-deliver to Reading sorting office at 0800 on Monday. It didn't reach Swindon until 0800 on Tuesday (ffs I could have driven there in an hour!) and hasn't arrived anywhere else since then (now 21.00). So the earliest it will hit the lab in Birmingham is tomorrow and if they take 2 days again that'll be 4 days in total.
Now here's the issue. Delays in getting these tests back is merely inconvenient. But when we return abroad we have to take the tests within 72 hours of our flight and get the result before we fly. But the track record of the Royal Mail plus our testing lab is making this look very risky. Our flights are one per week...
So the question - how did you make sure you got your fit to fly test result in time?