It's very pure, it's weapons grade, it's novichukchuk so it was dem Ruskies. That's what we're told. I'm still waiting to be told how we KNOW that a substance used days earlier that we retrieved in extremely tiny amounts from a doorknob/park bench/somebody's poo-poo/a dead guinea-pig was "weapons grade" or whatever other important-sounding technical term (terms that are designed for us neither to understand nor question) is used. And even if it is that pure, how does that prove it had to be only made in Russia? Do other countries not have science labs and intelligent personages in white coats and goggles wielding pipettes? C'mon, Iains, we need to batter this stuff home into one or two rather dense cranial cavities around here!