Leaky kitchen tap. This is what I've managed to expose of the valve so far. The rest of the metal is solid (welded). The tiny mark on the top is where the colour dot (hot / cold) is and is solid. Clearly I either need to expose more of this valve somehow or maybe I need a special tool.
When we moved into our current house we received (amongst other things) a whole house electrical inspection form / certificate.
Since then my Father-in-law who is an electrician from Ireland had replaced the consumer unit, and I have rewired the sockets in to rooms all the way back to the...