Well, that was a fairly spectacular evening and night of rain. I live on top of a hill (yes, Suffolk, I know - but these things are relative!) so in general the rain drains away fairly well. Last night the rain was so heavy that it temporarily created a lake on my patio about 3-4" deep. That was enough to overwhelm the fairly pathetic rain defences under the door of my little studio extension adjacent to the patio, and flooded the underfloor space which is insulated with rockwool under a chipboard floor. I've now got to lift the entire floor and somehow dry the rockwool out. Meantime, the rain is lighter but ever-present, so that's not getting done any time soon.