The ASUS Eee Pad Transformer Prime has finally gone on sale in the UK, with the first stock of the dockable Android tablet going to clear what the company describes as "huge demand and pre-orders." The Tegra 3 quadcore slate which we reviewed back in December has since seen an upgrade to Ice Cream Sandwich, which ASUS released ahead of schedule this week, and comes with a removable battery-equipped QWERTY keyboard for extending runtime and easing text entry.