Well, thanks for all the good wishes, unfortunately it looks so far as though nobody was able to get it on the internet. A couple of people in the UK phoned in the morning to say they couldn't get the audio, although they were able to get on to the site so I think something was wrong at the station's end.In the event everything went off OK apart from one massive screw-up where I thought Elizabeth was going to start another part of a medley, so I hit a huge A chord but she continued playing in G. However I spoke afterwards to a couple of people who said they didn't even notice, but maybe they were just being kind.
Murray