Hi, I came home the other day after 2 nights away and walked into a flood on the bathroom floor on the 1st flr (above the kitchen). The walls in the bathroom were dry as was the radiator. The water had also seeped out onto the landing at the top of the stairs and also into half of the back bedroom. The kitchen ceiling below was also saturated and water was dripping down the kitched walls. If I was to draw a circle around the boundary of the water on the first floor the centre appears to be the bathroom radiator. We cleaned up the water, and observed that there was no further water leak. I checked the pipes under the bath, the floor was dry there, I checked the pipes under the sink, they do not appear to be leaking, toilet water was OK and the cistern, no leaks. The bathroom rad has no evidence of a leak, so we are totally puzzled as to where all the water came from (the attic is dry). The only thing I could not check were the radiater pipes in the wall (this wall also adjoins the back bedroom). My guess is that the leak has to be from a source above the ground level on the 1st floor, but why is it not continuing? The central heating (combi boiler) and hotwater still work fine. I am totally puzzled and worried that it will happen again. Help...