On a late September morning, the stone staircase leading from the Gothic front door into the heart of Hawarden Castle – the former seat of William Ewart Gladstone, four-time British prime minister – is a hubbub of excitable hounds, a tremendous number of walking boots and a collection of Liverpool FC scarves knotted around a couple of serious-looking busts. “Every time I go to the football I buy a new scarf,” says Charlie Gladstone, 8th baronet, entrepreneur, author, great-great…

