Useless Windmills

Today is the coldest we've had so far in this part of the country, according to my trusty (mercury filled) max/min thermometer is was down about -5 Celsius last night and it's still below freezing at midday.
But when I went for a short walk,  it didn't feel nearly as cold as it was a week or so ago because there is absolutely no wind.  Never mind, the house is nice and snug as long as there is electricity to drive the central heating!
Of course when we rely on windmills for 20% of our electricity, there would probably have to be power cuts, as there is no way that any commercial organisation would have plant with 20% spare capacity available "just in case". Indeed, according to my contacts, there is virtually no spare capacity at the moment with aged equipment being pressed into use to keep the country supplied at a time of maximum demand. I'm told that what could be a relatively minor breakdown under normal circumstances could cause blackouts over large parts of the country if it occurred during this cold weather.
Just let's hope that we have an outbreak of sanity in the Department of Energy and Climate Change with the appointment of Ed Davey as  the new Energy Secretary and that steps are taken to ensure that we would have electricity under the worst possible scenario.