Popsycal: I looked at Miss Selfridge Online, and saw that they didn't have the exact cardie that my colleague was wearing and you described - but she did buy it in a RL branch, honest! I'll find out which...
It's a bit like the one on their site which is in a jade colour, but is longer - hip length?, and has long sleeves, and is choc brown?
The online shop has hardly anything.