David Cameron has said British laboratory tests have confirmed that the lethal sarin nerve gas was used in the notorious chemical attack in Syria in August.
The positive tests for sarin were completed this week and made on clothes and soil taken from the site of the attack in Ghouta, eastern Damascus on 21 August. The tests were carried out in the past seven days by British scientists at the Porton Down facility, and will be deployed by Cameron in a fresh attempt to persuade the Russian president, Vladimir Putin, to do more to force the Syrian president, Bashar al-Assad, to the negotiating table.
The samples brought to the UK from the Syrian borders are different to the hair and blood samples tested in the US. Details of those test results were released by the US secretary of state, John Kerry, four days ago.
British sources did not give further details of the precise content of the UK tests, but said they were confident the samples had not been tampered with during their passage to the Syrian border, and then to the UK.
Read more: http://www.theguardian.com/world/2013/sep/05/sarin-syrian-chemical-weapons-cameron