On Fri, 03 Jul 2015 13:33:13 +0100, Dave Plowman (News) wrote:

The standard abbreviation is and always has been B&B.

Yeah, but an ampersand isn't going to play well in a url.

It's a thread title. My newsreader doesn't complain if you use it in
that.

Tell that to http://www.airbnb.com (or http://www.airbnb.co.uk)

I'm really quite surprised that so many people appear never to have heard
of them, tbh.