I admire stout oldies who, even in good times, refuse to put the heating on unless it’s absolutely necessary. They can’t under-stand why we younger, healthier people are fussing over our energy consumption right now. Do we not know there’s a war on?

Even the boomers appear to be making a token effort: stoking their wood-burners with sustainably sourced, locally grown logs; installing plush electric blankets in the spare bedrooms; stocking up on cashmere jumpers in tasteful shades of oatmeal.