Christmas potatoes?

I’ve decided to end the Christmas potato experiment. With the short days now the plants are not going to grow and tuber development will have stopped as they need a certain level of daylight which they are not getting. Had I started them three or four weeks earlier I might have done better but I only decided to do it when I picked up a pack of seed potatoes at half price in mid August. Anyway, to the result. Yes, I got some potatoes, enough for a meal for three with a few spare but that hardly justifies the effort. Most were no bigger than marbles and had to be discarded. I imagine that if you live in the south of England and can get them planted by the end of July you may get a worthwhile crop but for me it was a complete waste of compost. Still, it was one of those things that I just had to try. Nothing ventured, nothing gained, as they say and at least I now feel able to pass comment on the subject.