I had to get back to work after day 5. I booked the 2-5-8 PCR bundle. I was worried about post over the weekend and the Day 5 test to release result coming back in time. Customer service gave me the option of dropping off at their Heathrow clinic or couriering the sample directly to the laboratory. I dropped off at Heathrow on Day 5 and received the result on email overnight. It worked perfectly and my boss was pleased to see me on the day I had committed. I would highly recommend this option if you have to escape quarantine, and your Day 5 falls on a Friday/Saturday/Sunday.