EDS' infographic compares the construction, capacity & costs of the new Thames Tideway Tunnel against London's pioneering Victorian sewage system. Built in the mid 1800s to serve 2 million, nowadays it is buckling under the weight of 8 million dwellers. Just 2mm of rain means sewage overflows into the Thames, this occurring on average once a week, demonstrating the urgency of the new £4.3B project. More info here: www.expressdrainagesolutions.co.uk