Circle and Star theatre, LondonTouring to mark the diarist and Carry On star's centenary year, David Benson's poignant show covers the full spectrum of what made Williams so funny, beloved " and insufferable It will be 100 years next month since Kenneth Williams' birth, and almost 30 since David Benson created his hit show about him, Think No Evil of Us " versions of which he has toured ever since. Here's another one…