Planning approval for HS2's Balsall Common Viaduct in Warwickshire

At its Planning Committee meeting on 6 September, Solihull Metropolitan Borough Council approved HS2’s plans for the Balsall Common Viaduct. The plans incorporate local feedback focusing on environmental sustainability, landscape integration, visual connectivity and public access.

The project is being led by HS2’s main works contractor, Balfour Beatty VINCI (BBV), supported by a Design Joint Venture of Mott MacDonald and SYSTRA together with architects Weston Williamson + Partners. They have engaged with people in the local area over the last couple of years to gather feedback on the viaduct - a 425 metre-long section of the UK’s new HSL. Understanding the landscape context was a key focus of the design, and plans include wet woodland planting using native species to the local area, woodland edge planting to provide screening, and hedgerow planting to improve wildlife connections.

A realignment of Bayleys Brook will increase habitat for fish, aquatic invertebrates and potentially water vole. The approved design sees a reduction in the size of the railway embankment running parallel to Bayleys Brook by 75 metres, improving the resiliency of the area to flooding, and enhancing views through the viaduct to the wider landscape. 

To improve connections, the Kenilworth Greenway will be extended to Station Road on the south-eastern side of the existing railway line and a further extension towards Lavender Hall is currently under consideration. Options for cycling and bridleway extensions are also being considered.

BBV will construct a total of 16 piers to carry the viaduct 10m above ground, crossing over Station Road, Bayleys Brook, Heart of England Way Walk and the local floodplain. Construction refinements have reduced the size of each pier by as much as 17 % for single piers and 28 % for double piers, giving the structure a lighter appearance. Responding to feedback about the look of the viaduct, a section at Station Road will be finished with a bespoke pattern, referencing the local history of the area.

The approval comes with conditions that there will be further engagement and more work will be undertaken on the colour and finishes of the concrete and the type of tree planting around the viaduct.