Do they use that tough Hummer because of those Basque terrorists? The Royal Ulster Constabulary, which used to police Northern Ireland (where there has been a lot of friction over the years) used armoured cars like Land Rovers.

The London Metropolitan Police was once lent a Lamborghini Murcielago in police livery, but I don't know if it actually did any service, maybe it was just a show car. The government's critics would go mad if public funds were spent on exotic supercars for police forces, never mind how much fighter planes and warships cost.