Crossrail2

Plans for the Chelsea-to-Hackney section of Crossrail 2 are in the early stages. Under the proposals, the line would run from stations in Hertfordshire to parts of Surrey and would open in the late 2020s. In central London it will pass through Euston, King’s Cross, Angel, Tottenham Court Road and Victoria.
This is the link to the consultation page. The safeguarded area, which sets out the boundaries of the land within which the new infrastructure could be built, has been published.
http://crossrail2.co.uk/