No matter whether you live in London or Los Angeles, Acton or Aachen, Camden Town or Camden New Jersey, you can never tire, as Dr Johnson wanted to say, of an hour in Charles Dickens’s favourite, the Ye Olde Cheshire Cheese. Or there’s the chance to sup with the great actor Ian McKellen himself in his own Limehouse pub. But we don’t just drink. We tell the history en route, shaped from decades of immaculate research, as we sojourn from inn to inn.