Have been trying on and off for a couple of months. had a few minor successes, and some loaves that could have been rejected by a medieval peasant for being too tough. Then on Sunday- real success!! I had been using the river cottage technique, which involves up to 4 rises. I started to wonder if this meant that the gluten structure was being over challenged and had finally collapsed. The worst one had been repeatedly risen and knocked back. So i looked for another method and found it on a french website. Anyway there are only 2 longish rises, and by the time i put it in the oven it didn't look too impressive (rather flat and compact) but boy did it rise in the oven. And the taste!
If you are still awake, my advice is only a couple of rises of up to a total of 6 hours, then 2 or 3 slashes and straight into a 240 C oven for 10 min, reduce to 200 and give it 30 minutes in total before checking it's done.