Hard to say what's going on exactly what this clusterfrack of a listing over at Tesco. While the Dell laptop shown is the £299 Inspiron Mini 9, it's labeled with an Inspiron Z530 title bellowing a 12-inch display. Moving down to the specs, we've got a spec-for-spec match to the unreleased 12.1-inch E Slim exclusive we brought you back in June: same 1.6GHz Atom processor; heavier 1.2kg (2.6-pounds) weight; bigger 12-inch WXGA (1,366 x 768 pixel) display; wider 29.9-cm (11.8-inch) dimension; and 40GB hard drive spinning Ubunto Ubuntu Linux. So Tesco, October 6th you say? Full Tesco specs listed after the break because that read link won't be up for long.
P.S. Dell doesn't sell a Atom-based 12-inch laptop under any model number presently, nor does it have a Z530 in its product roster.