I think that it's very unlikely that she will be able to sing in the immediate future Richard unless there is a suddent miracle intervention (which I doubt). I went to the Lewes Saturday Folk club Ballad Workshop with the Claque with her four weeks ago, and she was having breathing difficulties with one of her songs there. Things have got somewhat worse in the last couple of weeks. Knowing Marian it would take a lot for her to give up singing, but it has got to the stage where she realises she has to be sensible.