Water

Not that I would ever mention the rivalry that some people think still exists between Yorkshire and Lancashire - after all, the Lancastrians did beat us in the War of the Roses (at least that's what Wikipedia says), fair play to them.
Still, at least we can actually drink our tap water without having to boil it.

Cheers!

(Full marks to the BBC for the news headline below - I like the well placed apostrophes!)

http://www.bbc.co.uk/news/uk-england-lancashire-33833340

And to keep up the Yorkshire bias, the 3 Yorkshireteers have put up a new music video - enjoy!