 The only other high-speed route in the UK is High Speed 1 (also known as the 'Channel Tunnel Rail Link').HS2's proposal is for a Y-shaped network between London and England's major regional cities, serving Manchester, Birmingham, Leeds, East Midlands and Newcastle, with connections on to the West Coast and East Coast main lines to allow through services to Scotland.The Greengauge 21 study states that the total route length, including the connections to the existing network and High Speed One, would be .