This page links to the various NUJ rates guide pages and rate submission page, vital resources for all photographers’ and other lens-based media.
The importance of maintaining the NUJ advised rates cannot be reiterated enough. In order for freelances to hatch out a living wage, these rates are constructed to form a minimum rate from regular updated information from union members. In order to maintain, improve, update and continue to validate these rates, members are urged to take a minute to supply information on the rates they are earning. You can do this here at the Rate For A Job submission page.
The Freelance Fees Guide is a good place to start, with rates for all aspects of writing, photography, video and audio.