Is Cornwall English? - twenty thousand Cornish men, Will know the reason why!

If we include Norfolk, Wild Rover - but Ireland got to brand that one.

Rule Brittania I think they would recognise. But sing?

Danny Boy, written by a Bristolian in Bristol. tune - Londerry Air, subject - Irish.

Maggie May - that would confuse them.

Fishermen of England - too obscure, even for many English.

London Pride - would they know that one?

London Bridge is Falling Down - ah maybe. Had to be Lundun innit?

You know we would struggle on the premise of the OP. I think the go to - Ilkley Moor (bah gum).