It has suddenly got very cold in Bordeaux. Over the course of two days it went from about 17°C to about 4°C. In our flat we seem to maintain a temperature of around 22°C to 25°C. Our thermostat is set to 19°C, but we seem never to have plumbed these depths and so our radiators have not yet heated up. Such, I suppose, is the efficiency of modern insulation.