Not a 'help - swim for it!' emergency but the ball valve in the toilet is broken, and hence it's dribbling continuously out of the overflow. A job I'd happily do apart from the fact I can't switch the mains off to cease the flow to it!! The valve turns ok but the water keeps coming. I don't want to force it and wreck the stopcock, any tips??
I'll save my rantette about Thames Water's Homecare service till later.

