[tweetiepooh]

While it's true that modern cars, especially performance ones, have the features to make it possible to drive at higher speeds safely, it's the "others" who are driving less safe vehicles and who are possibly less able/aware for whatever reason you need to take into account.

Top Gear showed how a modern car can stop in much shorter distances than listed in the highway code but that doesn't account for the trucker behind you who has been driving beyond his hours with a heavy load who most certainly can't.

I do agree that some limits do seem to be too slow, unless you are the parent of a youngster killed pulling out of a side road on a main artery, or who lost control on a bend. Then you may appreciate a lowering of the limit. Again it's driving to the conditions that needs emphasising not to the limit.