Head techer of Fircroft Primary School in Tooting, Anne Wilson, speaks of the pain felt by everybody at the school, pupils and adults alike, after hearing that Imani Green had been killed.
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Transport for London is not happy that its branding has been used.
If you've been anywhere near Trafalgar Square today you'll notice something different.
Look closely at this collection of images by photographer Jim Grover and you'll notice there's something missing.