Who's Bugging the Buggered?

Well, the Hatt Mancock debacle has certainly thrown two things into focus: one, Boris Johnson's complete denial of the fact that he actually is the place/person where the buck stops - it's in the job-brief, you idiot! But the concept of actually taking responsibility for one's actions seems to have been drummed out of him at Eton and replaced with the Übermensch mentality that most alumni of that institution appear to espouse. 

Secondly, the question of the covert surveillance that brought about the [probably temporary] fall of the [now departed, but not sadly missed] Health Secretary. The question remains - who put it in place, and to what end? Given that the kind of tech involved is available on EBay for a tenner, it could be anyone with a grudge against the said departed. Could be a very long queue - but given the extreme levels of security surrounding Government buildings, one can only assume someone on the inside thought it a good idea to pop a hidden camera into a smoke detector on the off-chance of catching some 'interesting' footage. Which also begs the question - what was the expectation? Sounds like insider knowledge/grudge/night-of-the-long-knives sort of situation rather than Russian agents, to me. Who could it be?...