Please report dangerous drivers to the police - Roadsafe. Report to plod, not just whinge here.

Yesterday, on a rural road near Lechlade I was maliciously hassled and then assaulted by a guy driving a "Highway surveying" logo'd car and his passenger.
They drove slowly alongside me, then pulled ahead and slowed to my pace again about 50 yards ahead, then stopped, swung at right angles across the road, forcing me to stop. Driver immediately started to hold his phone up, presumably videoing me, and he and the passenger immediately started giving some really nasty and aggressive verbal abuse.
When he moved forward slightly I tried to go around the car, but he reversed at me, (and missed) then pulled forward again.
As he pulled forward I shot behind him and rode off, knowing full well they'd come after me.
They did, following slowly for a few hundred yards, passenger shouting all sorts of nasty abuse. Then the car pulled alongside, the passenger showered me with lucozade, and the driver swerved at me, although kind of anticipating something I was already hard on the brakes. He missed me, the lucozade didn't.
I was able to cross to the other side of the road when they passed, into a riverside car park full of people, and hid. They came back, spotted me, but then fortunately decided to leave. I got the reg luckily, and reported it, but I can imagine the police will do bugger all.
Utterly terrifying. Heart rate hit a new max.