Some info below….
For UK coverage you can try buying "The Freelance Photographer’s Market Handbook’ which is an annual listing of hundreds of publications with contact details and brief wants lists.
It’s available from the Bureau of Freelance Photographers (BFP) and costs around GBP15.00
A good UK online resource is Media UK at:
A very comprehensive listing (available as online or hard copy) covering UK, Europe and Global regions try Willings Press. Sometimes they offer a 30-day free trial for the online directory