So they allegedly found the bottle in a park. But the outside of it presumably wasn't contaminated (either because exposure to the air gets rid of it. Or does it. Or the assassin was careful enough not to contaminate the outside of the bottle, but not careful enough not to just chuck it away in a park). And Dawn and Charlie didn't open it then, because the couple later went on to have lunch in amesbury with 200 people didn't they? So they couldn't have been wiping traces of the stuff about there or loads of people would be coming down ill, in fact half of salisbury and amesbury. So presumably they didn't open the bottle until later, at their house. And maybe Dawn stuck her fingers in the open bottle and then touched things round the house which is why she got iller and died while her partner was less ill?
So why the panic about the park in that case (a 'friend of a friend' was in the park and has been told to get rid of what she was wearing - I can't actually vouch for the accuracy of that) - how many vials are likely to be in there, you'd imagine precisely One, and that's now accounted for.
And why would you pick up a random vial of something and take it home.. it's not a cut glass victorian scent bottle is it. Surely it's just going to be some secure small vial that the assassin wouldn't contaminate themselves with. Oh I know these were scratter drug addicts and obviously they'll pick up anything just in case it's got drugs in. No that can't be right can it? Because you just can't imagine this looking like anything remotely interesting. And really, this assassin didn't even stick it in the bin in the park? (which would have been emptied many times since the Skripal poisoning). They just threw it under a bush??? Why wander all the way to the park if you're just going to chuck it on the floor. Why not just leave it wherever the skripals were poisoned (chuck it in the bushes in their garden, if we think it was at their home). Why this random park?
Also should we believe that the novichock was being carried around in such a vast quantity that there was some left over, enough to poison other people. Why not just use the lot at the Skripals - I mean you would wouldn't you, surely? The two people who were directly targeted to be killed, they didn't actually die although the assassin presumably made sure they got a proper big dose, and the person who has died just touched an effectively empty bottle.
It's still a bit weird. You've got to admit it.