An artist's impression of a British siesta, circa 2060.
Which is odd, because Australia (and, I believe, the US south) keep Anglo-Saxon working hours and have quite hot days in summer. Either British temperatures are expected to exceed current Australian temperatures significantly, or the Australian solution of installing air conditioners everywhere has been ruled out (perhaps because there won't be enough fossil fuels to power air conditioners by then?)
Must... resist... urge to quote Nöel Coward.