I strongly suspect that the BBC will be carrying the audio element on Radio1.
If that is the case, they have a policy of everything broadcast on BBC radio nationally here beign available to listen to online for one week afterwards. In fact I seem to remember that copyright issues prevented a number of US orchestras appearing in last years Proms classical concerts, because individual players insisted on repeat fees!
Either way, if you go to
www.bbc.co.uk/radio1 and follow the links to "listen again" you should find it.