But along with my imaginings of what a fictional detective might enjoy, it has long been one of the Royal Family's favourite places. The walls are dotted with photographs of the late Queen Mother enjoying cosy gatherings here with her friends in the racing fraternity. Her nephew, Lord Linley, designed the restaurant's furniture and her favourite grandson, Charles, is planning a 60thbirthday brunch here. A very happy birthday, Sir. The dining room is large but intimate, buzzy yet private, with large windows framed by chartreuse curtains. From the ceiling hang fairy-tale branches of blossoms, fashioned from Swarovski crystals. I'd brought a novelist friend, and she loved them.