@Neil B "There is a massively decreased police presence on the roads, and an actual traffic stop is the only way to catch someone doing this."
Some areas there aren't any traffic officers even before the cutbacks, Devon & Cornwall Police for instance have just 7 traffic cars across the entire region, the biggest single police force area in England, and the regular patrol cars couldn't care less about motoring offences. I've seen police cars going round without headlights well into dusk, and they ignore drivers who have a brake light or headlight out - this being a rural area the roads are unlit as soon as you get outside the towns.