Well-known British reporter Robert Fisk says that a doctor at the hospital which treated the victims of an alleged chemical weapons attack said there were no chemical weapons … and that it was a member of the White Helmets who started the false rumor.
And American reporter Pearson Sharp says the same thing, that none of the local residents heard anything about a chemical weapons attack, and the locals said that the Islamic terrorists faked the attack in order to create enough chaos and confusion that they could slip out of town:
This would appear to confirm what the former British ambassador to Syria says.