Police have released a photograph of Kyle McDonald, one week after the 19-year-old was shot dead in a street in Battersea. Police are asking witnesses to contact them.
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"I do not accept the allegation that I have brought the Labour Party into disrepute", said Livingstone.
Family and friends of the victims of Grenfell Tower have been paying tribute to those who perished in the disaster.
The balmy conditions have swept in on a high pressure system, dragging in hot air from the continent, according to the Met Office.