Was driving home about a month ago, doing 42~ in a 40. Car comes up behind, overtakes pretty sharpish and speeds off.
I catch up at a roundabout, it's clear ahead as traffic is all moving across the roundabout and both lanes go straight on so used the inside lane and got in front as he wasn't quick away. After the merge back into one lane he comes right up behind again, blues come on.
I take the next side road and pull over, he pulls alongside and puts the window down - two up.
Both tell me how it's not clever, never know who it is behind etc. and then speed off, clearly exceeding the (now 30) limit.
I did exactly as he did but obviously he was upset by that. One rule for them, another for us!
Wish I'd had a dashcam in the back as the front facing one didn't show anything exciting.