This is a reliable service. The appointment was booked with ease and the result was sent before 16:00 the next day, as promised. A certificate is emailed and to you containing all the necessary details. The only thing that I was not told in advance, and which I would have liked to know, is that I had to do the swab myself. This involved swabbing the back of my throat and in the nose. I was very concerned afterwards about not having done the swab correctly, and I was stressed about the possibility of receiving an inconclusive result which would have stopped me from flying the next day. Happily, my fears were not realised but I think that customers should be informed of this important detail as they may choose to have a family member accompany them, to take the swab. Overall, I highly recommend this service.