Yesterday, I found a website called Fashion Workie through the UK Fashion Intern twitter profile (@ukfashionintern). Fashion Workie is a great website that is rich of content and is always advertising numerous work placements.
These placements vary from fashion journalism, to events, marketing, PR and many more. Some of them are paid, and they all vary in duration. It's definitely a website worth checking regularly.
Visit Fashion Workie at: http://www.fashionworkie.com