BBV Ready for Second HS2 Deck Push Over M6 Viaduct Near Chelmsley Wood Balfour Beatty VINCI (BBV) prepares to slide the West deck of HS2's M6 South viaduct into place, starting 11 April 2026, with the first 107-metre section over the southbound slip road. The 320-metre twin viaducts, built in weathering steel with 1,250-tonne segments, use hydraulic jacking over live motorway traffic, refining techniques from the 2025 East deck success. This Delta Junction milestone boosts h