Britain welcomed Monday's UN report into last month's chemical weapons attack in Syria and said it was "abundantly clear" from the findings that Bashar al-Assad's regime was to blame.

"We welcome this objective and unequivocal report which confirms that chemical weapons were used on a large scale," Foreign Secretary William Hague said in a statement.

"From the wealth of technical detail in the report... it is abundantly clear that the Syrian regime is the only party that could have been responsible."

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