In practice, none of that is actually a (soluble) 'problem' if none of those parties are making any attempts to considerably reduce the cost of energy to consumers.
Having said that, at least England, Wales and Scotland are surely all connected to the same National Grid (I'm not sure about Ulster), so I would imagine that any government action to reduce the cost of electricity would have to be GB-wide (if not UK-wide), and brought about by 'central UK government' wouldn't it?
