The Balfour Beatty VINCI joint venture has achieved a significant milestone in the construction of Britain's high-speed rail network, HS2, by completing two key spans of the parallel single-track Water Orton viaducts over the existing Birmingham to Peterborough railway line near Water Orton in Warwickshire. 

The spans make up a small section of the Delta junction, a large triangular interchange currently under construction east of Birmingham for the new high-speed railway. Similar to the nearby Spaghetti Junction, it consists of a complex network of interconnected viaducts that carry the high-speed line over motorways, local roads, existing railways, rivers, and floodplains. The junction is designed to accommodate HS2 services to and from Birmingham while also linking to the mainline routes heading north and south. To support speeds of 360 km/h on the mainline and roughly 200 km/h on the approaches to Birmingham, the junction covers a much larger area than a typical motorway interchange, extending over 2.6 miles of track and incorporating underpasses, flyovers, and five major viaducts. The Water Orton viaducts, located at the northern end of the junction, will enable southbound trains to access the spur into Birmingham Curzon Street as well as the Washwood Heath rolling stock depot. When finished, the two single-track Water Orton viaducts will span approximately 1.4 km, crossing two railway lines, a river, local roads, and the M42 motorway. The structures are built from pre-cast concrete segments installed using a large-scale cantilever construction method. After each span is positioned, permanent post-tensioned cables are threaded through the hollow core of the viaduct, allowing the temporary supporting cables to be advanced to assist in assembling the next span. This process is repeated from pier to pier until all spans are fully assembled. The 32 concrete piers supporting the Water Orton viaducts reach heights of up to 20 m and are cast in situ using custom formwork and reinforcing cages produced at nearby Coleshill. The Water Orton viaducts are part of a total of 3.7 miles of viaducts across the Delta junction being constructed with this method, with all 2,742 concrete segments fabricated at a temporary factory located at Lea Marston.