The impact of "the Greenies" has not been to increase prices but reduce them. Solar and wind power are cheaper than gas or coal. If we had not had significant wind and solar plant, your electricity and gas bill would be even higher than it is now. Introducing more renewables into the grid reduces demand for fossil fuel, lowering the cost. Low market prices means that some extraction becomes economical unviable (consumers and industry buy low cost not high cost materials).
Being "caught with your trousers down" is about the removal of long term bulk gas storage (a buffer against market volatility) and being a nation reliant on energy import. Perhaps if we had invested more in both wind (which we have in abundance) tidal (which we have in abundance), new-build solar and grid level storage, as a nation we might be both less reliant on imported fossil fuel AND greener.