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All hail the power of taps and toilets, two amenities that we Londoners very much take for granted. WaterAid has put together this exhibition of archive material, photographs by Thomas Ball and sanitation stories from the charity's' supporters – including Ringo Starr, Hugh Bonneville and Sir Tony Robinson – to mark the 150th anniversary of the capital's sewage system. The reason that Sir Joseph Bazelgette's visionary sewerage solution was built in the first place boils down to a load of MPs who couldn't stand the stench of the Thames during the summer of 1858. After attempting to sort the problem by installing heavy chloride- and lime-soaked curtains in the Houses of Parliament, they were finally defeated by the appalling whiff and within a record 18 days a bill to refurbish the entirety of the River Thames was created, passed and signed into law.