So how many client-lawyer conversations did they monitor before they found one that had a good change of surviving a challenge? I bet they did many.

""There may be other situations where it would be lawful to monitor privileged consultations, for example, if it is necessary to obtain information of an impending terrorist attack or to prevent the threatened killing of a child,""

I'm guessing they did mass surveillance, then found one that might pass Lord Carswell test, then prosecuted that discussion (incitement? i.e. speech?) and now he's legalized it, all client lawyer discussions will be monitored. All MP-constituent discussions etc.

I don't think Lord Carswell really thought that one through. He's effectively green lighting, for example, monitoring of all MPs. That is just another type of priviledge discussion which is not written into RIPA.

So the senior police will monitor the communications between MPs till they find one who says something likely to survive incitement prosecution, then they'll prosecute that. i.e. they're subjecting the whole legal system right up to Parliament to police surveillance.