Sadiq Khan has got big plans for London's suburban rail routes, and they involve a very orange map. He plans to make an official business case for TfL to take over London's commuter train routes, and as part of that, TfL has released a map of what this could look like. The existing routes would become part of an expanded London Overground network, which is why the new map is basically a sea of orange.
The plan is for TfL to take over the routes as they come up for franchise renewal, which would mean kicking things off with Southeastern in 2018, followed by South West Trains in 2020, while suburban services running to London Bridge and Victoria would transfer in September 2021.
Want to know what else Sadiq Khan has been up to? He's also announced plans for a 'London Living Rent' scheme