The notion that Britain doesn’t have covert tentacles in Syria is the absurd position, not vice versa.
My “notion” is that May does not have the male genitalia to order a chemical warfare false flag attack in Syria. She is the most risk averse politician you will find.
The fact that Theresa May is an incompetent European deep state puppet is concerning, but does not reduce the likelihood that British special forces were involved in Douma.