I've written a very long piece of music recently, the 'Veil of the Temple,' which lasts about seven hours. It's really a kind of vigil. It takes place during the night, waiting for the resurrection of Christ.

I was having these terrible back pains, and then one day in Switzerland, things got very bad. My wife Maryanna called the hotel doctor, but I don't remember any of this, I was out of it. I had an operation, and I was nearly lost.

The Whale' was in the category of so-called serious music, and yet it brings together a wide series of musical styles. It was influenced by people such as The Beatles, the spirit of the times, and I think 'The Whale' certainly had a pop element to it.

In his late quartets, Beethoven introduces an element that shouldn't be there, that should be left for meditation, though I love them. I can see that through them came Wagner and Mahler and Schoenberg and Berg. And then came Tracey Emin. And I can see it all as one downward path.