Indeed TB
In Kent many PC's are at 'basic' driving level, which means they cannot respond to any call other than driving as a civilian would, obeying the speed restrictions, stopping at red lights, etc, along with not being permitted to use the two's & blue's whilst in motion, and only using the blue lights when stationery protecting the scene, or dealing with an incident. But every shift should have at least one 'standard' trained driver on duty.
The 'standard' trained PC's can respond to calls using the blue & two's and, as has been already stated, are allowed certain exemptions under the Road Traffic Act when responding to an emergency situation, but are still held responsible when things 'go wrong'.
The Advanced 'A' drivers only are permitted to enter into high speed pursuits, which their training has given them the tools to do. However, they are still held responsible in law when 'things go wrong'.
Overall police officers have to do a very difficult job, where life or death situations can arise, with crucial speedy decisions having to be made, to give assistance to the public. Sometimes things go wrong, although the PC has just been trying to do their job to the best of their ability. 8-) 8-)
Life is not perfect, even for police officers!!

Most of the Police drivers do a good enough job, (the motorcyclists tend to better for obvious reasons - they don't want to get hurt), but I often feel they could do with some real racing experience.
It is all well being 'trained' to drive at speed, and to control a car on a skid pan, but there is nothing like a real chase, as the adrenalin rush that follows can make the most reasoned and level-headed Cop do silly things - sometimes with fatal consequences. Those with racing experience are well used to this effect, and so know how to deal with it, sometimes over long distances, and don't let it cloud their judgement.
To illustrate this, some years ago I was out on my bike (a very well fettled 350 LC Yamaha) early one Saturday morning , and was enjoying the fast, sweeping curves and long straights on the A272 between Petersfield and the A31 at Winchester. (This was before they spoilt it with silly roundabouts and the like).
Anyhow, as I came into Winchester itself, I was aware of a Police bike coming up rapidly behind me, so as I was entering a 30 limit I slowed down to 30 MPH, and just cruised along trying to look innocent. It was a good try, but I got pulled over all the same, and the Copper was shaking so violently with adrenalin that I had to put his bike (a Police Norton) on it's stand for him and sit him down on a nearby bench!
It turned out that he had been chasing me all the way from Petersfield, and had been hitting 120 plus on the straights, but every time we got to the bendy bits he 'had to slow down in the interests of safety'. He admitted that at one point he thought he had lost me, (just after the East Meon Hut), but he could still smell the Castrol R from my bike, so he knew I was somewhere ahead.

Once he calmed down he gave me a good bollocking, and was going to throw the book at me, but thankfully I managed to persuade him that he was probably a greater risk to himself than I was. He also gave me a lecture about using tyres with 'not for highway use' stamped on them, but that is another story.

NN