it depends... usual european speed limits are pretty fair: 50 km/h (~31 mph) in populated areas like cities or villages, 90 km/h (~56 mph) on most roads, and 130 km/h (~81 mph) on most freeways. in hungary, they don't even fine you if your speed was less than 20 km/h over the speed limit on a freeway, and the fine for a moderate speeding (between 150-170 km/h, 93-106 mph) is around 30k local money, a bit over $100. and to get a ~$1000 fine, you have to drive over 240 km/h (150 mph) on a freeway with a speed limit of 130 km/h.
in some countries, fines are related to the person's salary. dunno about uk rules too much, but that might have influenced lemina's fine.