When a branch line to connect Tonbridge with Tunbridge Wells was created by the South-Eastern Railway Company, it was necessary to build a viaduct over the Colebrook Valley, the major engineering feat of the five miles of track. The Colebrook Viaduct is 254 yards (232.26 metres) long and consists of 26 arches. It was opened on September 21st 1845. The railway forms the eastern boundary of Southborough and High Brooms.

Photographs by courtesy of Michael Tayler