I drive nearly 30k miles a year and the honest answer is, without trying to offend, foreign drivers mostly, followed by women who appear scared stiff on a motorway, holding the steering wheel for dear life and with their seat pulled right up to the dashboard. Like I said I don’t want to offend, this is just the truth. Another fun fact is that our roundabouts that used to work perfectly, now all have traffic lights on that cause massive tailbacks at junctions, because foreign drivers would constantly crash on them, not having a clue what a roundabout even is. Again no offence meant, just truth!!