London super sewer turned on after eight years of construction

London’s £4.5bn super sewer has now been turned on after eight years of construction work.
The first four of 21 sites have been switched on with the new tunnel starting to protect the River Thames from sewage pollution for the first time.
Valves, which operate like giant gates, are now open at four sites with the rest due to come online in the coming months when the sewer will reach full operating capacity next year.In May the new 25km super sewer was connected to the 6.9km Lee Tunne