Image copyright Thames Water Image caption The “concreteberg” is the biggest ever seen by Thames Water A “concreteberg”, weighing as much as 20 elephants, is blocking three central London sewers. The 330ft-long (100m) mass, weighing 105 tonnes, was caused by people pouring concrete into the sewers. It could take two months and cost £150,000 to…

Image copyright Tayfun Salci/Anadolu Agency/Getty Images Image caption Police began moving campaigners from Waterloo Bridge in the early hours of Tuesday More than 100 climate change activists have been arrested after blocking roads in central London. Extinction Rebellion campaigners were ordered by the Met to confine their protest to Marble Arch after causing widespread disruption…