High Speed 2 (HS2) is a planned high-speed railway to link the cities of London and Birmingham, and then to extend to North West England and Yorkshire.The first phase of HS2 is set to begin in 2017 with an indicated opening date in 2026, while completion of the entire network is expected in 2033.Phase one of HS2 is to run between London Euston and the proposed new Birmingham Curzon Street station.