River Thames reign was the completion of the multi-piered London Bridge, which acted as a barricade and barrage on the river, affecting the tidal flow upstream and increasing the likelihood of the river freezing over. In Tudor and Stuart times, various kings and queens built magnificent riverside palaces at Hampton Court, Kew, Richmond on Thames, Whitehall and Greenwich. As early as the 1300s, the Thames was used to dispose of waste matter produced in the city of London, thus turning the river into an open sewer. In 1357, Edward III described the state of the river in a proclamation: "... dung and
HMS Queen Elizabeth (R08) "Gleaner" and 42 Regiment, Royal Engineers to gather information on the tides, the depth of the river bed, and the height of the three river crossings (Forth Bridge, Forth Road Bridge, and Queensferry Crossing). This was necessary as the most recent data available were 60 years old. "Queen Elizabeth" sailed on 26 June 2017 to undergo sea trials. The first stage of the operation was to move the ship from inside the fitting out basin, via one of the access gates, into the Firth of Forth itself, before taking her under the three Forth bridge crossings. Once this was accomplished,