Replay Radio is $30, but, quote,
"Replay Radio is an incredibly easy way to record radio broadcasts. It's like a "TiVo™ DVR" for the radio. Just pick your favorite radio show, or select a station and a time range, and Replay Radio records it for you. Hundreds of shows and stations are pre-programmed, making recording as easy as point and click......Once your show is recorded, Replay Radio makes MP3 files for listening with an MP3 player, iPod, or your PC. Or, you can have Replay Radio automatically burn a CD. Everything happens automatically!"
Don't worry about it only picking up stations using WAV, if you go to their list of preprogrammed stations you will find 965 of them including, for example:
BBC 1 Xtra
BBC 6 Music
BBC Asian Network
BBC Radio 1
BBC Radio 2
BBC Radio 3
BBC Radio 4
BBC Radio 7
BBC Radio Five Live
BBC Radio Scotland
BBC Radio World Service
BBC4 - High Quality
BBC4 FM
SuperMP3Recorder is shareware but quite basic. The Pro version is also $30 and I presume has similar facilities to Replay Radio, but I do not know if it supports the BBC as their support seems much more limited.