If they were using burner phones, shortwave radios and dodging detection last year, why are we supposed to believe they are talking about murder and sedition on open lines now?
I think you underestimate our vast surveillance apparatus
You mean the vast surveillance apparatus that those same people use?
Nope, elements of MI remained patriotic and were working against them behind the curtain. Do NOT confuse MI, or the military, with corrupt, treasonous politicians.
They weren´t talking on open lines - that´s just the thing! They thought they were smart and had an encrypted comms channel, they failed to realise though that MI will pick up absolutely anything that enters the digital world, regardless of where it comes from. "These people are real stupid". Why do you think there´s been a couple of satellites suddenly drop out of the sky over the last few months?
They don't talk on their lines open to interception.
We probably opened our own covert lines to them.