Here's a BRILLIANT idea from those fabulous guys over at Woven Wheat Whispers, who are bending over backwards to provide a site that is one of the most informative I've ever seen!
They're busy compiling a list of, to use their words: "Folk Clubs, Bookers and Agents" in the UK....and they've a list of Folk Magazines on there as well!
Here is the relevant page for anyone watching this thread: