Thanks everyone.
I've taken srobarts suggestion first as, despite what I had thought, the machine was indeed using WZC. Atheros drivers and utility now installed and being tested as we speak. Incidentally, the Atheros link on the Samsung support page actually points to the Bluetooth driver package...
Applemacster, my ISP is Bethere (pretty much the same as O2) and I wasn't aware of that issue and dont seem to have been suffering from the problem. Thanks for pointing it out.