hot tank

Hi All Hoping for a bit of plumbing help. Our tundish is always dripping. It always (and I mean always) drips, 24/7 but since the heating has been back on its more like a flow of water as pictured. I assume its an overflow from the hot water tank but I dont understand why it would always be...

Hi, Summary: I am looking to buy a replacement battery. Does anyone know where or how to find one? I believe this is the problem. I changed the tank to a thermal store. I left the Horstmann switched off at the mains ie no power to charge the battery, for several years. Apparently they won't...