Interesting thread... clearly there is a small chance of everything at the moment, including nuclear war. But Putin making noises about it doesn't mean it's going to happen. A conventional war is more likely, starting I'd guess with the invasion of one of the Baltic states. But how that will play out with Trump in charge of US involvement, f*ck knows.
The whole discussion sounds a bit odd to me. It's the British media specifically that are going on about living in a pre-war era. I read Flemish, German and US media as well (reading news being my main procrastination method, and having lived/living in these countries) and the war talk doesn't happen the same way anywhere else.
I think it has to do with the way WW II is fetishized in the UK, as this great test of society (that society passed). Implication being that 'we' all have to pull our socks up again, gird 'our' loins, be ready for the next test...
It's very different in a country that doesn't stand a chance in a major conflict (Belgium) or has lost a couple of them crashingly (Germany). You don't talk about getting ready for war by way of rhetorical flourish (which is how the Tories first brought it up, I think, bunch of unserious chancers that they are).
(In the US, I think they just worry less because they've got other things on their plate and are big, isolated and used to fighting wars, win, lose or draw, with relatively little hardship for civilians.)
I bought some extra bottled water, a water filter, some tinned food and a camping gas stove with canisters in the run-up to the US election (and was a leetle bit tempted to invest in a lead suit, but gave my head a wobble).
My 2016 self would be in stitches at these actions, but I think by now they're sensible if you've got kids to look after and are the worrying kind. It stops me thinking about it too much (which is clearly a waste of time, as there are too many imponderables involved).