Looks like you can only get them from the Radiohead ticket line 0870 730 7305, or the Zodiac, if you know of more places with tickets, post it up on the site.
Tickets are a 27.50 each subject to a booking fee.
UPDATE: I was at my first Darkness gig on the day of this gig!
Paul Clarke's blog - I live in Hythe, Kent. Married to Clare + father to 2, I am a full-stack web developr, and I do js / nodejs, some ruby, other languages ect ect. I like pubs, parkrun, eating, home automation + other diy jiggery-pokery, history, genealogy, TV, squirrels, pirates, lego, and TIME TRAVEL.