The current advertising campaign for Plusnet internet services includes billboards which proclaim: “Our broadband won’t be beat on price”. If you read the small print, you note that the company is based in Yorkshire which explains the headline.
People generally choose internet providers based on price, speed and reliability rather than geographic location.
According to ‘An introduction to Language’: “Writing follows certain prescriptive rules of grammar, usage and style that the spoken language does not, and is subject to little if any dialectal variation”. (Fromkin, Rodman, Hyams, 8th Edition, p.16)
Unless you read the small print, it remains to be seen whether people in the south will understand the joke. If they don’t, this advert could flop.