Tonight on BBC4 TV I was lucky enough to hear a snatch of Magdalena Kozena singing some songs by Novak (before incoming phone got in the way), at the live Prom they have just shown. She didn't look nearly as glamorous as she does in her publicikty stills, but she has a truly beautiful voice and made wonderful use of it this evening. I have CDs by her, but have never heard her sound so good.

Classical music on TV is often somewhat of a waste of all that camera work, but when someone is singing in a foreign language, the subtitles are a real help.

Later in the concert, however, there was an extraordinary moment, at 9.29 pm to be precise. Jiri Behlohlavek was conducting a very nice performance of the Prague Symphony by Mozart. Except that during the last movement the proceedings were jarringly interrupted by a plug for the latest manifestation of the rerun of Robert Hughes Shock of the New series, about Modern Art. And then it was back to the Mozart as if nothing had happened.

Imagine being the person responsible for a grotesque cock-up of this sort? And I wonder if any reference will be made to this interruption, now that the concert is over they are all clapping?

Here comes the same advert again. And now a voice says: "You're watching BBC4." Yes dear, I know, but do you know what BBC4 just did? It would seem not. Now they are showing a little programme about Bollywood movies. No apparent realisation of or apology for what happened.