x20 unmarked police cars?

Coming up the a3 from Pompey tonight i saw an unmarked police car with its blues on, then another, then another , then about 15 more evrery min or so! Wtf is going on with that?! Every single one unmarked!

Probably a high-risk prisoner being transferred to or from one of the Isle of Wight prisons.

Or they are leggin it from some Lava ■■

Or fast roads / pursuit driver training

Free dougnuts.