This was part of the half price offer they did recently. I popped into the Oxted store last night, and they had a load of these on a 2 for £30 offer. I think others were included but don't know which ones, but picked up a couple of these.
Not bad value for a vintage champagne (although clearly this won't be the best vintage champagne....but you're not exactly paying top prices for it!). Worth stocking up for Xmas and the New Year celebrations.