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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Eric's been performing his impressive stunts at Clissold Park and even skates the half pipe.
The unusual sight caused quite a stir on Twitter.
Reverend Simon Harvey from Islington lost his wife Jennifer to a sudden illness nine weeks ago.