HS2 Ltd has appointed Simon Kirby as chief executive, construction. Mr Kirby joins from Network Rail, where he was managing director, infrastructure projects, leading on a £5bn a year investment programme to improve the country's railways. The current chief executive Alison Munro will continue in that role until September when she will become managing director of development to oversee the passage of the Hybrid Bill through parliament and the development of phase two of the project.