I got pulled a few months back, when I was in the lolvo. Was crusing down the bedford bypass at a fair old speed, certainly a little too quickly.
I saw an older gen Vectra pull out into my lane and stay a while back. I looked at it for a while and just as I thought 'hmm, surely they wouldn't have an unmarked car that old' the blue lights came from under the grill.
He sped up, I pulled in and he overtook me, and of course even though there was no chance I hoped he was going for someone else. It said 'follow me' in the back window, so I did.
Sat in the back of his car, ran through the usual insurance/license stuff. Most amusing part was when he said (in a surprised tone) 'oh, it's insured, that's a good sign'. I was a little offended, then remembered I was in my temp wheels; a banged up £150 volvo. The insurance cost more than 2x the car.
He explained he had a calibrated speedo, and a camera. He said he had to do 95+ to keep up with me.
Fortunately he let me off with a warning as I have no previous encounters with the police. Very scary, perfectly justified, and had the desired effect; made me consider if I was actually gaining anything by traveling that speed (I wasn't). I've got no issue being stopped by a police officer, it's only the stupid cameras and such . . .