A while ago, the oafish Dr. Tharg , enquired about Gavin Bryars' Jesus' Blood Never Failed Me Yet. http://www.london-se1.co.uk/forum/read/2/23000
I went to the RFH last night, along with the estimable Mr & Mrs Bridger, to hear a performance by The London Sinfonietta, which was conducted by the composer. It was absolutely superb, and vastly superior to the recorded version I have. Mr Bryars explained how the piece came into being, and touched upon the origins of the song that underpins this work. He explained that he was never able to establish the provenance of the “hymn” that the tramp sings, and he believes that it was an improvisation.
There was also a very moving recital of The Sinking of The Titanic.
I didn't notice any, but I'd keep an eye on the listings anyway. I certainly gained by having Gavin Bryars explain the thinking behind his work, it enhanced a wonderful experience - he is also a very funny man.