Police spotting (junction watch)

New Oxford St; police officer poking his head out of a manhole cover. I had a brief chat with him. He usually works in the Fraud Squad but has been seconded to the new force of Underground Operatives or 'sewer cops' as they are colloquially known. The idea, as far as I could gather, is that he is able to observe road users behavior from his semi-subterranean vantage point without, as we would say here on the forum, being 'spotted'. He then radios his more fresh-air breathing colleagues and they nab the miscreants without them ever having the slightest clue as to how they were noticed RLJing.
So better keep your eyes down and if you see a manhole cover move even a little, behave!

Am i actually reading or has all the beer gone to my head? Sneaky fokkers trying to catch our money.