I wouldn't try it these days, that's for sure, roads are far too busy.

Here's one I nearly forgot. Last year I was tooling down the M40, nice and legal in fairly heavy traffic, when a cop car pulls in front of me and straddles lanes 1 and 2 and lights up his "follow me" sign!

So I look at the bloke alongside me in lane 1 and he looks at me and shrugs his shoulders. So we both pull over and stop behind the cop car. Young officer gets out and says to me "Not you, we were trying to pull over the truck behind you. Please rejoin the motorway safely when I move away". Then he goes to the bloke behind me and says much the same thing, I guess, gets back in the car and drives off, not really giving me the chance to say "then why the fuck did you put the sign on in front of us and not the truck?".

Probably just as well I didn't get the chance, but it comes to something when a motorway cop can't even pull over the right vehicle.