Hi, Back again I'm afraid. Following 3 previous return visits the plumber came and this time changed the warped Donut Seal for a Rubber one. Everything has been OK for two weeks but now there is water under the Cistern again. Do you think there could be a problem with the Bolt fittings? Would it be an idea to take the whole thing out on the step where the underside could be looked at more easily and put water in it to see exactly where its coming from?