It's raining hard again. I think I've started to figure it out. That double celled low over Baily, Rockall and Hebrides is throwing out a whole spiders web of fronts, cold, warm and occluded. Five of these are approaching Cornwall.
Given five fronts, call them the front front, front of the middle front, middle front, back of the middle front and back front, I think last night's rain was the front front, and the rain now it's the front of the middle front, or the middle front ... or both !!
Of course, I could have all this back the front.