The saliva test is done via Polymerase Chain Reaction (PCR) which is the current gold standard method for detecting the virus (SARS-CoV-2) that causes COVID-19. This saliva test has already been used by the NHS.
The saliva test can be sent directly to your home or office and you will not need to have contact with anyone else while you perform the test. The test can then be couriered directly to the laboratory.
For the saliva test, you will just need to spit into a special test tube. The laboratories used to analyse the results are all UK accredited. The tests will not detract from NHS testing.