Wizbowes, I don't have the 900 but I use my N810 all the time to listen to BBC radio. There's a great site containing iPlayer links as RealAudio streams which load and play much more quickly than the iPlayer equivalents (at least they do on my N810). Try this:

http://www.beebotron.org/index.php?r...en_Again_Links

or this for the live radio:
http://www.beebotron.org/index.php?r...ve_Radio_Links

Even for the live radio I always find the RealAudio streams work best. You get a very occasional bandwidth or buffing delay but you don't miss anything.

Actually, the site's worth exploring - it has lots of other interesting stuff if you're into "Listen Again".

Good luck!