Staged redevelopment: diagram showing the different aspects of the work at Euston. Phase One (marked as A on the diagram) covers construction of six new high-speed platforms and a concourse to the west of the station to support the opening of HS2 Phase One (London to the Midlands) high-speed services in 2026. Phase Two (marked as B1) is for construction of five further high-speed platforms and a concourse to support the opening of Phase Two (London to Leeds/Manchester) high-speed services in 2033. Station redevelopment (marked as B2) shows the potential redevelopment of the remaining existing station platforms and concourse, subject to future funding and approvals.