Change In Aim NewsLatest News On Change In Aim HS2 train services not expected to reach top speed of 360km/h due to cost increase, with revised schedule to May 2036-October 20395/19/2026 10:15 AM HS2 train services not expected to reach top speed of 360km/h due to cost increase, with revised schedule to May 2036-October 20395/19/2026 8:39 AM