Cooked at 240 C rather than 250 (I didn't like the look of the phenolic knob on the lid after yesterday) for 30 minutes lid on, then only 6 minutes lid off. The crust is lighter in colour but the shape and rise are identical to yesterday.
So water first and Allison dried active yeast to rehydrate for a minute or so, add flour ( I used Tesco strong white bread flour) and salt, 30 seconds mixing with a silicon spoon, just enough to get it mixed, leave 24 hours and pour/scrape into a preheated pan.
Dave
Edit: My next test was to have done the 24hrs in a cooking vessel and just bung that in the oven, Porker, you have saved me that experiment! so it was worth it, really!