In reality, even with all else being equal both Wales and Scotland would probably be less receptive to a British GOP than that - but maybe England slightly more so.
Agree that our "Dems" would have an in-built advantage though.
I wonder though if Wales isn't perhaps a bit like West Virginia. There are similarities beyond the superficial.
Maybe a few, arguably. But my point is partly that both Scots and Welsh can be considered "minority" voters in a way, if you are taking a UK context. So maybe a bit comparable to Hispanics in the US.
(and yes they swung GOP last time, but are still majorly Dem)