 In 2009 there were reportedly of high-speed line in operation in Europe; a further were under construction and another were planned.High-speed rail arrived in the United Kingdom with the opening in 2003 of the first part of High Speed 1 (then known as the Channel Tunnel Rail Link) between London and the Channel Tunnel.The development of a second high-speed line was proposed in 2009 by the United Kingdom Government to address capacity constraints on the West Coast Main Line railway, which is forecast to be at full capacity in 2025.