Foreign Secretary William Hague is expected to give a statement on the current crisis in the Middle East and the progress of the Iran nuclear talks in Vienna.
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The book by Cameron comms chief Sir Craig Oliver reveals that Mr Cameron was frustrated with Theresa May's neutrality during referendum.
Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.