Fawaz Gerges, Director of the Middle East Center at the London School of Economics, has told ITV Daybreak that "it would take a spark to ignite the conflict in Syria."
He added: "The conflict in Syria has mutated and taken a very dangerous turn. It has major implications for regional stability and international peace and security."
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The former shadow work and pensions secretary is considered a more viable candidate than Angela Eagle, a Labour source has told ITV News.
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Right-wing think tank warns leaving the UK in order to remain in the EU would turn Scotland into 'Greece without the sun'.