"Britain is actually an ocean away from mainland Europe" is one of the tired tropes of political fiction. Even in the worst dystopias, Britain somehow seems to escape the unspeakable horror of being in the same boat as the Continent. See 1984, V for Vendetta, Children of Men, etc. Threads, which you mention, is the one exception that I am aware of.The only other country that plays a role in the plot is the United Kingdom, which does so in a manner I find to be implausible. Britain here is shown to be mostly intact
This seems unlikely to me, though I can't claim to be wholly in charge of facts, which makes anything I say dubious.in a nuclear war in the time period, Britain would most certainly have met the fate depicted in the haunting BBC film Threads
Funnily enough, considering the likelyhood that the Soviets would have lobbed a nuke at Dublin (and possibly Waterford and Limerick as well), I actually can see the UK and Ireland emerging as some sort of federal/confederal state. Especially if there aren't any senior royals left alive.A 1962 nuclear war will not be a picnic (though probably would feature an amount of eating outside in the aftermath), but I don't see it being a 1984 Threads apocalypse either.