Speaking to our reporter Clare Fernyhough at City Hall today, Will Smith, with son Jaden, said how important it is for young people to have positive role models.
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At least two people have suffered minor injuries but the cause of the blast is still unknown.
A songwriter from Harlesden who wrote a track for Beyonce's Lemonade album has been nominated for a Grammy Award.
Sadiq Khan issues the first 'very high' air quality alert since becoming Mayor