For a long time, commentators, columnists, experts and even one or two politicians have been warning that unless we invest in our energy system the lights will go out. It follows, then, that the out-going chief executive of the energy regulator Ofgem, Alistair Buchanan, is leaving his post with a massive disclaimer, saying: "I've warned you." He claims that quite apart from not investing enough in new plant soon enough, we are now becoming more and more reliant on imported gas, leaving us vulnerable to fluctuating prices. Meanwhile, our Government blames the last one and politicians, like Nick Clegg, bluster that all will be well. If it wasn't so serious, it would be hilarious. The long term supply of energy for our island is vital, both strategically and quite obviously economically. And while I welcome moves to find so-called green energy, like tidal power, we must accept that renewables rely too heavily on subsidies and provide only a tiny proportion of the energy we need. The only common sense solution is nuclear, which will keep us warm and secure for decades ahead until a proper, working alternative can be found.