And I'll add my tuppenceworth -- what I'll miss most about Sheila is her wicked sense of humour. She and I had many a giggle about the state of singing and song, but it was always about the fact that she cared deeply and had real expectations (and demands) about what a traditional song should sound like.
I learned such a lot from her by osmosis, and I don't think we disagreed on much. It was a real privilege to have known her!