[Madhatter]

I notice that other sites have very similar urls and I was thinking, what legal implications is ther on using a url with the name of another site in it. ?
just for example so you know what I mean warwickshire-online. com and warwickshireonline.com
I'd like to use a url for a forum but its already in use by a company, they are xyz ltd on xzy.co.uk and i want the forum name to be xy-z.co.uk on url xy-z.co.uk