It is 8am on a rainy morning outside Ruby Wax’s house in London’s Notting Hill Gate. The American-British comedian, writer, television personality and authority on mental health has suggested we meet before breakfast, although the reason for this timing, intended to be helpful to each of us, no longer seems as clear as when the arrangement was made. It is like being up for some antisocial budget flight. Her white stucco house is handsome from the outside and lights are on in the lower-ground-floor kitchen as I ring the bell. I spot a window box crammed with artificial flowers –...