in britain i've seen police use:-
Smart cars, Ford galaxies, peugot 307, 106, volvo estates, Ford Focus', Vauxhall Astra's, Ford Mondeo's. Thats all i can think of. Now in the UK there are big fights over how many cops are on foot patrols and how little work they do. So all their extra funding goes towards gettin more cops in. I think it would be just a tad diffucult for them to get Lotus'(which are a bit too light i would have thought), jaguars, TVR's and the expensive aston martins. I know some countries with their big cities and great funding might afford them, but britain aint like that, and if they did it in London i think they would have the tyres slashed on every jag they got.
Also britain has some of the worst goverment services around, for example, the NHS (N ear Hell So what, the striking fire fighters, the never there wen u need them police, and the wheres the tracks gone rail system