Hi Taff, the only journal I know specifically for the saxophone is (surprisingly) called 'Saxophone Journal'. It's not available readily from UK suppliers but is very easy to take out an international subscription.
The publisher is Dorn Publications and you can subscribe online at www.dornpub.com/saxjsub2.html
It's not a pretty web site, but effective.
The journal comes out 6 times a year and is a good read. It is heavily oriented towards the American market, is packed with interviews, playing tips, practice tips, jazz tips and also has a few sections dealing with classical saxophone. There is a repair page, cd reviews, book reviews and every issue comes with a 'masterclass' cd. This is usually in the format of a play-a-long.
The current subscription rate outside the US is 62.5 dollars and strikes me as good value. I enjoy the magazine.