in reading (thames valley police i think) i'm wary of every car…. initially it was just new black/silver cars with whatever the most recent and new registration was (09/59 etc) but they're using a HUGE variety of vehicles, seen a few rude-boys being pulled over by unmarked police in cars with bodykits and so on (high spec golfs).
i find i get tailed by them a lot, i'm a young looking 25yr old driving a skoda with a national trust sticker and during the day if im driving i've usually got an anxious looking person in the car with me, all whilst driving at the speed limit and not 1mph over…. suspicious mix and i dont mind being followed.
after they check the details and realise i'm insured/mot/tax blah blah… they back off and follow someone else.
wish they'd follow some of the idiots on the roads instead of me escorting a already anxious/paranoid psych patient who's also noticed the suspicious black car and driving talking into walkie-talkies on their shoulders.