The Foreign Secretary William Hague has warned that the UK does not rule out any options if it in the interests of saving Syrian lives.
He said that Syrian president Bashar al Assad should not doubt Britain's resolve to react if he decides to use chemical weapons.
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The 35-year-old victim was pronounced dead at the scene.
More than 33,000 dead from both sides of Spain’s civil war are interred at the site.
The former Tory leader joined Health Secretary Jeremy Hunt and others who want the laws eased, saying the battle against the drug was lost.