Went to visit a friend who's quite ill last night and he's been putting up with a loud constant dripping noise for years. He keeps the bathroom door closed so it's not so bad until you open it and then it's really loud! It drips all the way down into a large bucket and then echoes everywhere. So I asked him if he's ever called the landlord to sort it out. He lives in a housing association and they're pretty useless. He calls them out occasionally when the leak gets impossible to manage or something. They change a part and then the leak returns again after a couple of months. He lives in a block of flats at the end and says that the water pressure builds up so his pressure is at the max. The water is leaking through the rubber washer around the handle on the front of the tank (top left) which is worn and no longer sealing the gap. I opened the lid of the tank and he said he thinks the water level should be lower. The water is level with the handle which is why it is leaking and has worn the washer off over time. I suggested replacing the handle and lever arm etc but, as he says, that's only another temporary solution as would be my original idea of squirting silicone around the washer. Any suggestions would be helpful even if we can't fix it but simply pass the info on to his housing association so they have no excuse next time. Cheers.