In the UK, the resources include soya-based animal feeds imported from Brazil [0]. Cattle cannot live by rainfall alone.
Of course they can, as long as you don't have too much of them. Animals in the wild live on rainwater alone just fine.
Also Normandy isn't in the UK, it's in France. Different countries have different practices around animals.
These two places are not comparable.
How are the production practices different? How do the differences relate to resource usage?
Cattle production in the US is something like 20% greater than Brazil, the next highest producer according to the first source[1] I found, producing literally 1/5 of the world's total beef.
There's piles more data out there, and probably a lot more to say, but this is probably the answer to a first approximation.
1: https://beef2live.com/story-world-beef-production-ranking-co...
That's not really surprising when US has 2.26x the arable land of brazil. If you normalize for that, brazil is actually 84% more intensive than the US. The European union is even more intensive.