'Derwent Walk Express' and supporting bridge abutment and approach spans

The 'Derwent Walk Express' is a polychrome relief frieze by Andy Frost, installed in 1986 on a 19th-century bridge abutment and its approach spans. The frieze marks the Swalwell entrance to Derwent Walk Country Park and formerly carried the Derwent Valley Railway across the Hexham road.

The bridge structure is a linear arrangement constructed of coursed, squared rubble, oriented southwest to northeast. It features five segmental arches and short returns at both ends. The frieze, approximately 1.5 metres high and 33 metres long, is made of layers of marine ply bonded with epoxy resin, painted, and lacquered.

The main elevation, facing the Hexham road, depicts a stylized steam locomotive and carriages in motion, painted red with details in black, orange, and other colours. The eastern return shows the front of the engine and incorporates the arms of County Durham Council, the former Tyne & Wear County Council, and Gateshead Metropolitan Borough Council. A Nuclear Free Zone symbol was originally included but is now absent.

The rear of the train and the northeastern corner feature a stylized tableau of animals, including a beetle, squirrel, butterfly, and badger, set within a rural landscape. These sections are painted in greens, browns, and blues and have an undulating outline. As the frieze extends away from the road, the panels become intermittent, visually blending into the landscape of the Country Park. One panel on the east elevation is missing, as evidenced by exposed brackets. Sections of frieze depicting rural and industrial landscapes are also present on the rear of the bridge abutment and the western elevation of the viaduct.

Several signs, also made of marine ply and part of Frost’s original commission, are affixed to the northern abutment. A long, Victorian railway-style plaque with raised lettering and clipped corners on the road elevation reads ‘DERWENT WALK COUNTRY PARK’. Wayfinding signs in a similar style are on the flanking elevations. Two small stainless steel plaques are set into the east wall: one details the work's creation by Andrew Frost, its unveiling by Norman Buchan MP on 9 October 1986, and funding sources (Tyne and Wear County Council, Gateshead MBC, and Northern Arts); the other acknowledges a BBC Townscape Award from 1988.

The railway abutment wall and approach spans that support the frieze are included in the listing.