Old dear and pensioner who is very old friend just been well ripped off by plumber. Apparently dual flush valve was doing the usual trick of not closing so water kept running. Well Wickes will charge you £13 for a new one and they take no more than 20 minutes to fit probably less. The thieving plumber who did it charged her £150! My bro who is a well qualified plumber says it should have been no more than £50