Beckton Sewage Treatment Works is an operational Thames Water sewage treatment works and is the largest sewage treatment works in Europe. Fugro were commissioned by Thames Water to install a number of rod extensometers above the recently constructed Lee Tunnel to monitor settlement within the ground.

R L Geotechnical Ltd., upon the recommendation of Geosense, were employed by Fugro to provide training on the installation and subsequent reading of the rod extensometers. Due to a change in the design, modifications to the extensometers were required on site.