http://www.tate.org.uk/liverpool A little bit of culture and often an adventurous programme of photography.
http://www.proud.co.uk London gallery with good stuff.
http://www.magnumphotos.com Simply the best, look at the work of the masters and weep.
http://www.worlpressphoto.com What's going on
http://www.eyestorm.com Commercial art photography site
http://www.specialphotographers.com Very good commercial gallery in London
http://www.photonet.org.uk The London photographers gallery is still one of the best in the world.
http://www.bjphoto.co.uk British professional magazine that offers more than most.
http://www.briangriffin.co.uk One of my first big influences and still a great photographer.
/http://www.edinburgh-printmakers.co.uk/ Not a photo gallery but a source of inspiration
http://www.stephencohengallery.com