It is essential that rail transport operates continuously with suitable light for safe passenger movement, security in vulnerable areas and access for maintenance. As a specified supplier to both Network Rail and London Underground, Coughtrie supplies both standard and bespoke offerings as well as Section 12 accredited low smoke fittings for tunnel applications. The London Dockland Light Railway (DLR) is the most recent project to have used these fittings. Here, Coughtrie proved to be the best fit due to the option of having blue light above key facilities within the tunnel.