This is about airport testing but it seems sensible to keep these reports on testing the same place.
BBC news
The rapid saliva swab, which is now available at Heathrow Terminals 2 and 5, is known as a Lamp (Loop-mediated Isothermal Amplification) test.British Airways, Virgin Atlantic and Cathay Pacific will now offer it to customers.
A Lamp test is quicker than the PCR test, which is widely used in the NHS, because the sample does not need to be sent to a laboratory.
Collinson, the company behind the initiative at Heathrow, admitted that the Lamp test is "slightly less sensitive" than the PCR test.
However, the Lamp test is considered to be much better than another rapid option - the antigen test.