Metropolitan police officers in Camden found £40 of cannabis in a hole by the Grand Union Canal on Wednesday.
What to do? Tweet, obviously.
Sgt Paul Taylor tweeted a photograph of the discovered drugs from the "sneaky hidey-hole"...
...followed by a message to the dealer who had left them there.
Surely that's undue and excessive banter?
One can only imagine the reaction upon discovery of the note...
Anyway, if you know anything about this, as the tweet says #GetInTouch on 101 or at @MPSCamden.