Anji Hunter is the former gatekeeper to Tony Blair's Labour government. She was once described as the most influential non-elected person in Downing Street and became one of Blair's closest confidantes. Acting as an alliance broker, Anji worked across businesses and the media, including Murdoch's empire.

After decades by Blair's side, Anji moved to the private sector to take up various roles across industries from BP to the Royal College of Engineering. As Boris Johnson welcomes the new Anji Hunter of 10 Downing Street, Samatha Cohen, Anji reflects on what it takes to do her former job – you've got to have balls.