Eyewitnesses in Aleppo have told ITV News that earlier today they experienced a strong smell, followed by white smoke which has caused choking among those in the city, following reports of a chemical attack.
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Former shadow foreign secretary Hilary Benn led calls by a series of senior Labour MPs urging colleagues to 'win' back the party.
A team of detectives and specialists is set to begin a painstaking excavation of the area where Ben is thought to have gone missing in 1991.
The foreign secretary's suggestion last week's bombing of an aid convoy might constitute a war crime prompted an angry response from Moscow.