Imogen Heap took a few days out from making her last album "Ellipse" to write a track that was supposed to feature at the end of TV programme. She wrote the song and recorded all the vocals, leaving the music for the composer who was writing the rest of the score so she could get on with her album. For one reason or another the song wasnt used and so the track never got completed. But their loss was Twestivals gain as she donated the aforementioned vocals for The Song That Never Was experiment.
Here is my version of "The Song That Never Was".