My mum's garden centre still had seed spuds for sale in June/July, so I managed to get hold of a handful. Carlingford is one of the varieties and I am going to have a go at it (though in a big "grow bag" thing). One bloke at my allotment site has cleared most of his spuds, but has already prepared the ground for a ton (nearly!) of second cropping spuds to go in (from Marshalls I think, as we get 10% off through our little society).