Quite typical of the Brits to get pissy about you saying the truth.
They went all over the world drawing arbitrary lines separating or forcing peoples together, but try to get them to understand that the world considers the UK to be a singular entity and they blow a fucking fuse over the semantics. And they're not even correct about the semantics!
The entitlement some British people feel over foreigners giving a shit for their internal politics is frankly outrageous.