So even if chariots were present in ancient Britain and Ireland, they would have been restricted to places they could get to?
Which makes me think about Calgacus and the famous Battle of Mons Gaupius. It's always been a bit of a mystery as to why, after seemingly quite successful guerilla warfare against the invading Romans which Tacitus tells us about, the combined Caledonians suddenly decided to make a stand and fight a pitched battle. But maybe they had quite limited places that their chariots could get to? (bearing in mind that even in historical Scotland getting around on wet and muddy roads was a hugely limiting effort). And there does seem to be a 'road' from Bennachie going directly north, which the Romans would then also use to go further north, as we can tell from their camps, and the thought has always been that the road was there before the Romans used it.