I have a recording of The Sirens - I think it was a live performance on Radio 3 probably about 20 years ago. I taped it at the time and later transferred it to mp3 and then to my iPod. I recorded it at the time because I wanted to see what else he had written besides the Esquisse that I was playing for my ABRSM grade 7. It is a marvellous work but sadly i did not make a note of the orchestra or conductor or any useful information.