Did mine last week. 7mm Allen Key to undo the 2 bolts that secure the caliper to the carrier on the rear of the carrier. I popped off the spring on the front, dropped out the old pads, cleaned all the surfaces with brake cleaned, applied a little copper grease to the rear of the pads and re-assembled it all. Don't forget to pump the brake pedal when you are done, before driving off!
Easy job, no longer than 20 mins each side (including the cleaning etc.)