The folding UK power adapter which was pictured a few days ago seems to have appeared for purchase in the UK store:
http://store.apple.com/uk/product/MGRL2B/A/apple-5w-usb-power-adapter-folding-pins
http://store.apple.com/uk/product/MGRL2B/A/apple-5w-usb-power-adapter-folding-pins