Llanigraham
On Moderation
I can only think of one place that a driver "changes the points" and that is down in Cornwall and from what I have seen he goes to a small "box" and pulls a lever. I suspect that you haven't realised that most points are not provided with those levers, so the switches have to be either "barred over" or if electrically operated there is a pump that has to be done. The points then have to be clamped closed with a special (heavy) item.Changing points, it's done elsewhere on branch lines so there must be a way of drivers changing points.
Not as simple as you thought, I'm guessing?