If any of you are ever in Edinburgh, check out Armstrong's for fab vintage cashmere. Some of the styling is a bit Morningside circa 1973, but it's the real deal, and very good value. I have a lovely green cardi I bought there 10 years ago, been through the washing machine many times and still going strong.
They have shops on the Grassmarket and ... umm... South Clerk St, maybe? just round the corner from my friend Jackie's old flat, anyway...