overflow pipes

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 The overflow pipe is dripping. I have been researching how to stop it but am now confused as to where the pipe comes from. In my naivety I thought overflows just came from heating systems. I have now read it could be from the toilet. How do I find out which it is coming from?

Can the 2 overflow pipes from the boiler, possibly condensation. 1 used to release water in to open air and the other was fed in to downpipe to drain. Both are letting out quite a lot of water. Is this a concern or normal? Also as downpipe and outside drain now gone, can these pipes be fed in to...