A chemical weapons expert involved in the apparent discovery of continued chemical weapons attacks in Syria told ITV News earlier this week that chlorine use is "simple to identify".
Hamish De Bretton-Gordon told Diplomatic Correspondent John Ray that Syrians should be armed with information on how to identify such attacks.
He added, however: "It's very, very non-persistent - once it's released it will remain active for, at the most, minutes.
"If there is a strong wind and if it is hot as it is in Syria it will disappear very quickly."
More top news
After six years of cuts to local authority budgets, the money simply isn't there to fund every request for adult social care.
South Carolina residents were told to remain alert to new dangers amid fears more dams in the area could burst as the death toll rose to 16.
As the upcoming film Suffragette is about to be released, ITV News speaks to the family of one of the key figures in the movement.