I spent much of Wednesday in fields in southern England. It was very warm for the time of year. I noticed there was almost no wind. Usually, even on calm days, one can see the autumn leaves trembling slightly on the branch, but there the stillness was absolute.
The following morning, it was reported – though not as widely as it should have been – that, for the first time, the National Grid had been so worried by a possible shortage of power when people got home from work on Wednesday that it had appealed to industry to reduce power consumption. Energy markets went wild. At one point, the Financial Times said, the grid was paying Severn Power £2,500 per megawatt hour: the usual going rate is £60.