Former N-Dubz singer Dappy has been found guilty at Chelmsford Magistrates' Court of assaulting a man in a nightclub.
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A volunteer on her campaign team said to a voter that rival Sadiq Khan was a "liability" because he is Muslim.
A food historian has claimed that pasties made in Cornwall were mainly vegetarian - and the term 'Cornish pasty' was coined in London.
The demonstration is due to take place next Saturday in central London ahead of the "emergency" meeting in Brussels to discuss the crisis.