The Brits would never be involved in faking anything. If you don’t believe me, ask Comey. He treated the Brit dossier on Trump with great respect, because the Brits, just like FBI brass, never lie or dissemble or create false flags
Could the Brits do this? Yes! But, why? Who gains by this action? It aint Assad or Putin. (or is it?) Putin could use a low end war to seize Ukraine? Assad to roll up his opposition? Or China did it to get Russian and USA to take out each other