On the other hand i bought an ex police driving school Rover 827 many years ago, it had a service history to die for, blue/grey, was unmarked in every way and needed nothing at all doing to it, came on a set of brand new Continental tyres too.

I ran that for several years during which time it never missed a beat, the Honda 2.7 engine was still so quiet and silky you had to look at the rev counter to know if it was ticking over, never used a drop of oil and it would still pull 145 without a murmer, without a doubt one of the best cars i've ever owned.

An ex traffic or general purpose car would have to be seriously cheap to tempt though.

Like everything in this world they are cheap for a reason so expect to have to put some work in to get it back to condition, if you want one careful owner perfection with a cast iron warranty buy an approved used from a reputable main dealer, though it will be up to three times the price of the ex plod motor.

The motorway and high speed pursuit cars are probably pretty good-the ones used for local work,I would avoid.