Our correspondent Simon Harris has been onto a Route 24 'Boris Bus' and recorded sweltering temperatures:
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Lorries weighing over 3.5 tonnes are legally required to have special safety fittings to protect cyclists and pedestrians from today.
A 25-year-old man has been arrested for urinating on the Cenotaph in Whitehall and pulling down commemorative wreaths.
As many as 60 bands in beautiful costumes are taking part in the grand finale of the Notting Hill Carnival parade today.