Other threads I found on this were over a year old, so I'm starting a new thread on this incase details were out of date. We're in the process of renovating a property, and as part of the re-wiring our electrician ran an unbroken earthing cable to the gas and water pipes (doesn't look 10mm to me - but could well be). However, we need to get a new gas pipe for a new boiler, and it will be entering the property at the other end of the building. So, should I run a new continuous loop to the water pipe and then the gas pipe, or can I just run a new cable from the water pipe clamp to the gas pipe (or from the main earthing point to the gas pipe)? Also, I *think* the current earth cable runs to the CU; however, there is also a meter cupboard for the flat on the landing outside which seems to have several earth cables connected to a terminal in it, can I run the cable from there (which would be easier), or must it be from the CU? Finally, he didn't mention, or install, any bonding for anything else in the bathroom. All pipes other than the gas and electric are plastic, but would metal taps, radiators, etc need earthing? Oh, and a bit of the old gas pipe will still be present under the floorboards (the pipe then runs through the property below and the end of the hallway below that) does this still need bonding? Also, there is a gas pipe running up to the flat above. It's only visible under the floorboards, and won't be accessible once the bath is in. Will this also need bonding? (I guess it should be bonded at the flat above, as it is there gas supply, but I suspect it isn't, as ours previously wasn't).