The Mayor’s team are proposing to introduce an ultra-low emission zone in the city centre, which it says has the potential to deliver dramaticbenefits in air quality. Boris Johnson also hopes it'll spur on mass take-up of zero and low emission vehicles.
But ClientEarth, the organisation which brought today's case, says current policies need to be made more ambitious.
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A lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.