Choral Music in Touch Of Frost Tonight

[Mortartube]

Does anyone know the title of the classical choral music in tonights Touch Of Frost. The music was played just before the first adverts, when the guy with all the art in his riverside apartment, was drinking a glass of whisky. Thanks in advance.

[Westminster]

This doesn't answer your question, I'm afraid, but I think it was the angelic choirboy stuff that they used as the theme to Smiley's People. A question about that might get a wider response. I enjoyed the one-liner 'I knew it must be a Hockney 'cos it was a swimming pool'.