RE: Lateral Flow Tests, agreed by PHE as 99.7% accurate, show 80% fewer cases in Liverpool17 Nov 2020 12:36
The second link makes it look like this is not matched testing.
I assumed people would get both the PCR and the LFT in that way you could work out the diagnostic accuracy against the PCR reference method.
I've only scanned it but the claim is baseless as this is the case as the differences could be linked to variation in the population