No point in phoning the plod.
I used to run a pub. I've seen many, many pissed people get into their cars and drive off.
This one particular time, a couple, who were well known in the area for being complete drunkards had their little lad with them. The bloke (who was driving) was so pissed he couldnt even stand up. Little sproglet crying because the couple were having an argument.
I asked one of the local builders who was drinking in the pub to put his van behind the car of the pissheads, of which he obliged, but didn't do a good enough job.
The pisshead, with angry drunk missus and scared to death child got into their car and proceeded to manouver their way out from the parking space. I called the police to inform them of an extremely dangerous driver, but the response was less than welcoming.
My father tells me there used to be a time where a Publican had serious clout with the Old Bill, and a call of that nature would have aroused their ticket book quicker than a rat up a drainpipe..... nowadays it seems they dont care. Obviously too much effort! Much easier to sit in a layby with a speed detector, eating doughnuts.