The London & South Western Railway built a number of viaducts using concrete blocks. These were pre-cast and then laid like masonry. Woolston and Derriton viaducts, on the Bude branch, still stand though they have been out of use since 1966. Calstock viaduct was by far the largest of these concrete block viaduct and is the only one to remain in operational use.

Weston Green bridge, Esher, photographed on 22nd September 2007. photograph by Gregory Beecroft

Weston Green bridge, Esher. photograph by Gregory Beecroft

Weston Green bridge, between Surbiton and Esher has concrete block abutments and wing walls.

Bridge 90, St Mary Cray, photographed on 26th May 2007. photograph by Gregory Beecroft

Bridge 90, St Mary Cray. photograph by Gregory Beecroft

Bridge 90 at St Mary Cray was reconstructed when the railway was quadrupled in the 1950s. The massive abutments and wing walls are built of large concrete blocks on a reinforced concrete plinth. The abutments are wide enough to take a fifth track. The batter to the abutments is a pleasing design feature.