The Mayor says that by taking control of the awarding of just two franchises, £100 million could be saved over 20 years. He eventually wants to control all suburban railways and introduce a one-ticket system across Greater London. At present rail services are provided by several companies under franchise agreements with the Government. Former transport secretary Justine Greening was said to be positive about Mr Johnson’s call to devolve powers over railways, but he could now face a battle to get his way.