Of course, it's kind of a moot point if you don't have a motorway-standard road within striking distance (fortunately, we have - the A64)
The furthest I've ever lived from a Motorway is about fifteen miles, and that was when I was a student, and certainly couldn't have afforded to have driven a car. Mostly I've been within about five miles of a Motorway.
I would have thought the majority of the UK population lived near enough to a Motorway, or was likely to need one from time to time, since it's the only way to really travel a significant distance through the UK.
I remember as a small child, prior to some of the UK Motorway infrastructure being completed, and it took a lot longer, and involved a lot more traffic queues, when the route to travel a longer distance only involved A-roads at best.