If you are Britain's Ambassador in Washington one of your jobs is to brief the Prime Minister on American presidential candidates. You need to produce a frank pen picture. It's a bit embarrassing if it gets out. This time Barack Obama's pen picture has got out. Now why should that be of any interest to Dr Grumble? Well, the ambassador is Sir Nigel Sheinwald and Lady Sheinwald is a doctor. According the the newspapers she is an internationally renowned paediatrician. Dr Grumble thinks they just googled Dr Julia Dunne and guessed the rest. She always used to work in medicines regulation. Dr Grumble used to share his sandwiches with her alongside the tramps in a small London park in Vauxhall. It's strange how things change. Presumably Lady Dunne is now entertaining the great and the good in the British Embassy in Washington. No more sandwiches in the park. But Dr Grumble still eats his sandwiches in the park. Alongside the tramps.