The world must hold Syria to account if it fails to comply with an agreement to destroy its chemical weapons, the foreign secretary has said.
William Hague said the pressure was on Syrian President Bashar al-Assad's regime, who had used the weapons "repeatedly against the Syrian people".
He said the UK's priority was to secure a UN resolution to enforce the deal.
He was speaking after a Paris meeting with his US and French counterparts about the US-Russian agreement.
Under the agreement, Syria must hand over a full list of its stockpile within a week and destroy its chemical weapons by mid-2014.
The framework deal was announced on Saturday after three days of talks in Geneva between US Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov.
The US and France had threatened military action over a chemical attack in an area on the outskirts of the Syrian capital Damascus in August.
The prevailing belief internationally is that poison gas was used and that hundreds of people were killed - the US says more than 1,400.
However, the Syrian government has always denied using chemical weapons, with officials blaming rebel forces. Russia, a key ally of Syria, has said there is no proof the regime was involved.
'Cat and mouse'Mr Hague said a UN resolution should enshrine the regime's responsibilities and Britain, the US and France would not accept any "cat and mouse games".
"A resolution should create a binding commitment for the regime to give up its chemical weapons within a specific time frame, to credibly, reliably, promptly place them under international control for destruction," he said.
"It is the Assad regime that has stockpiled these weapons and has used them repeatedly against the Syrian people.
"So the pressure is on them to comply with this agreement in full, the world must be prepared to hold them to account if they don't. And our three countries are certainly determined to do so."
He said the UK, US and France would use their "full weight" as permanent members of the UN Security Council to get the chemical weapons out of Syria and bring about a peaceful end to the civil war.
"We are determined to do everything we can to stop the bloodshed in Syria, to support the moderate opposition and to alleviate humanitarian suffering," he said.
"Our goal remains to convene a second Geneva conference to bring all sides together to agree a political solution to the conflict and we will work with Russia on bringing that about as soon as possible."
Mr Hague added the allies had agreed that the "credible threat of military force" played a role in bringing about dialogue.
The prime minister's spokesman has described the discussions between the US secretary of state and his Russian counterpart as a "significant development".
He said it was for the UN to test the credibility of the initiative and it was important to get on quickly as "speed is very much part of the credibility test".
