

So not trying to argue, just have a genuine conversation. Talking from an American perspective, British implies the British Isles (place) to me and not the people (who I honestly have no idea when they lived or currently live there??). I’m not familiar with any other name for the isles (again speaking as an American).
Also, I think (or hope) that most people would understand and any research into the Iron Age is only showing a survival bias that may not indicate the whole population in an area. However, I think it’s fair to state that if you see a trend across multiple sites in roughly the same time period, it indicates a larger cultural practice in that area because we are only seeing a small amount of surving evidence. For this reason, I think “some” is too broad.
So I think the “horse is likely to bite you if you’re looking in its mouth too closely” is an assumption we both had about this phrase. I grew up in the suburbs and rarely saw horses so I assumed this phrase was about it possibly bitting. However I now live in a more rural area and horses are pretty sweet and the only reason anyone looks in their mouth is to make sure they’re healthy or figure their age. I’m guessing you, like me, also grew up not around horses so we assumed the English version means something different than it probably did in the past when horses were common place.