He gets the agent put on his face, five minutes later he's limping and showing cognitive decline, ten minutes later he's unconscious, twenty minutes later he's dead. Not walking round the park, feeding the ducks (also giving some bread to a young boy who had no contact issues), going to the boozer for a couple of pints, going out for lunch, doing a bit of shopping and then collapsing on a bench several hours later. Also, Kim Jong Nam was "only" poisoned with VX not Novichok. Comparing VX to Novichok is like comparing Ribena to crystal meth. Now who's being unrealistic?
I'm surprised they are still trying to push the Navalnychok b.s. because it was so clearly dead in the water and an obvious put-up job almost from the start. I'm glad they are still trying because it might lead some people to look again at the Skripal scam. Perhaps that's why the fraud only had comments open between midnight and three a.m.