I mixed everything at lunchtime, 410g flour, 385g water, 3g yeast and 7g salt.
and that's it for 18 hours.
Next morning it had risen quite a bit and was bubbling,
I stretched and folded it and left it another two hours,
putting a Dutch Oven in to warm up at maximum.
It has 30 minutes covered,
then 15 more with the top off,
at which point it is done.
Not too shabby.