In reply to Catriona:
Anna, my wife, has a Patagonia Triolet jacket that is a really good fit for her. Size large, she is a 12/14 and it fits her ridiculously good.
Before that she had an older North Face jacket, goretex xcr that she had for about 6 years. Again in a large and a womens cut. Fitted her perfectly as well and when she has tried jackets on in the shops, as I said she found the RAB, Arcteryx, Patagonia and even the North Face ones were really a good fit.
Only reason we bought the Patagonia one was because we were in Canada and it was so cheap it was ridiculous! Hope you find one.
Den