There was one constant during the Johnson tenure: Carrie Symonds, or Carrie Johnson as she became halfway through their time in Downing Street. Carrie would be dragged into the press spotlight more than her predecessors, Philip May and Samantha Cameron. She was already a creature of Westminster, having been a special adviser to Sajid Javid and John Whittingdale, which partly explains why. Given this background, questions about her influence were inevitable....