Threads over sold and under sold the threats. A lot more people would have dropped dead from radiation and the blasts within the first month.
But I think it's fairly unrealistic that if millions of British survived they'd go back to tilling land. Sure a lot of tools depend on long global supply chains, but trade would resume as soon as radiation threats died down (a couple weeks).
We'd only go pre industrial if nearly the entire population was wiped out. Even then civilization would still thrive in areas not directly effected-like South America.
But I think it's fairly unrealistic that if millions of British survived they'd go back to tilling land. Sure a lot of tools depend on long global supply chains, but trade would resume as soon as radiation threats died down (a couple weeks).
We'd only go pre industrial if nearly the entire population was wiped out. Even then civilization would still thrive in areas not directly effected-like South America.