They are only useful for community testing to pick up some asymptomatic cases. Although I do worry that some people, having got a negative lateral flow test might be then more prepared to flout the rules thinking that they're safe to do so when they're not. Or if they then develop symptoms not bother getting a PCR.
Didn't the BMJ find publish a study showing that they only picked up 3% of positive cases when used at Birmingham Uni?
But anyway, using them instead of isolation was an idea of such stupidity I just couldn't understand why there wasn't more of an uproar in the press/in Parliament about it. Labour could have had a field day with that but if they did say something about it I certainly wasn't aware of it, and never heard anyone criticising the idea on the morning news, for example. The BBC seemed to present it as a good thing.