Although European leaders and US President Barack Obama have said they stand ready to impose tougher sanctions on Moscow, a fresh wave of penalties is not expected to be announced.
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If Number 10 announces it plans to hold a vote on airstrikes in Syria, the planners in the MoD might as well get to work straight away.
Britain should not "sub-contract its security to other countries" while terrorists plan attacks from Syria, David Cameron will warn MPs.
The number of children dying from cancer in the UK each year is falling, according to new figures from a major charity.