The proposed HS2 rolling stock tender specification does not preclude a bidder offering a tilting train solution. However, no tilting trains currently operate faster than 250km/h. HS2 Ltd assumes that tilting rolling stock could achieve a maximum operating speed on the high speed network of 300km/h rather than 360km/h for non-tilting rolling stock. This lower maximum operating speed would increase journey times on the dedicated HS2 network and could reduce network capacity. HS2 Ltd has assumed a number of minor line speed improvements on the northern West Coast Main Line for non-tilting rolling stock. HS2 will not serve Edinburgh until Phase 2B opens. Existing and projected estimated journey times from London Euston are as follows: Crewe Glasgow WCML Pendolino 1h30 4h17 Phase 1 non-tilt 1h08 4h00 Phase 1 tilt Approx 1h11 Approx 4h00 Phase 2A non-tilt 0h55 3h48 Phase 2A tilt Approx 1h01 Approx 3h51