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She said: "The evidence shows that nuclear is expensive, takes decades to build and the toxic waste is a risk to local communities. The SNP is clear that Scotland's future should be in cheaper, safer and cleaner renewables which support more jobs."

This, in turn, has meant increasing the prices for people without renewables, so it could afford "the fixed costs of maintaining and upgrading the electricity network", the company said.

The biggest reduction came from the electricity sector which has been shifting to renewables, principally onshore and offshore wind.

But the potential for renewables to deliver lower costs just isn't coming through to consumers.

Renewables now generate more than half the country's electricity, but because of the limits to how much electricity can be moved around the system, even on windy days some gas generation is almost always needed to top the system up.