Ah the Cornish Cornwall is the celtic part of England, they have their own language, flag and savoury pie (pasty).
Excellent advert , I rarely use the the underground/tube myself (though cycling in between buses and taxis isn't great either) but it's true, we probably still breathe in the skin dust of people who died a 100 years ago.
£8 a pint is wide of the mark though, at least round my way, and you can still get six cans of stella for a fiver