New neighbours moved in fairly recently. They seem nice and friendly, a couple with a young child. The dad smokes weed like there's no tomorrow, he's got a gazebo with a patio heater where he sits smoking whilst the mum puts the little one to bed every evening. I'm not bothered what he does in his own garden so I've just said nothing, but I've now realised he is also having a morning spliff with his coffee out there, then getting in the car to drive the little one to nursery and go to work. On the days he isn't doing nursery drop off I've seen him get into his car smoking as he drives off - I assumed it was just a roll up but after smelling the smoke out in the back garden this morning I now suspect otherwise! He is extremely scatty, presumably because he's perma-stoned, and regularly does things like leave keys in the front door or forget stuff and come speeding back down the road to grab what he's left at home.
Would you anonymously report him for drug driving? Its been a while (2 decades at least) since I smoked weed but personally I wouldn't have trusted myself to drive stoned!!