It certainly makes a change from the diesel fumes. Drug driving doesn't really seem to be on the radar in the same way drink driving was (though I'm not sure the police are especially bothered by that now, other than the brief bit of press before Christmas). Since I started back at the mothership and commute home a couple of days of week, I've seen precisely one traffic stop, in South Croydon for a car that was either dramatically overloaded or had no suspension, and I suspect both. The only place I can be reliable assuring of seeing police presense is the inevitable Wild West Croydon fracas, where one drugged up or pissed skinny bloke kicking off will require four police vans, a dozen squad cars, and a helicopter. I think they'd send a battleship if they had one.
The other disturbing thing was the number of speeding cars – and I don't mean the almost standard 40 in a 30 20 zone, I mean serious. Mostly youngish blokes in the usual 'performance' cars. Two zoomed past me on Landsdowne Road in Croydon at faster than motorway speeds. They were on the other side of road, so it wasn't a close pass, but needless to say when you hear a car coming up behind at those sorts of speeds you pretty much bail straight onto the pavement and find religion.