I don't know whether this is a resource which would be of use to anyone, but it seems like a pretty good starting point to me.
Photoassist.co.uk is the online community and database for assistant photographers, emerging phoyographers and students of photography. If you are an assistant, student, or just keen to get yourself some photography experience photoassist.co.uk encourages you to add your details to their database which makes you instantly visible in your area.