Also on sign-up to Yell, expect multiple calls from Yell's call centre in India. I'm saying you can't avoid them hassling you, but you'll get less hassle from Yell.com than YP paper directory.
Be aware that Yell is expensive, and charges more than Yahoo.
Hope this advice helps you out.
[edited by: Maxnpaddy at 7:05 am (utc) on Sep. 19, 2007]
That's worrying for a branded company that was once thought of as a 'player' in the UK market place. They need to do something.