First of all I'm not even sure if this needs to be marked down or not! I'm about to do a PIR on a friends property and whilst checking out another bit of work needing done I noticed that the main water service has just been bonded with a 10mm earth linked off the gas pipe and linked between all the other pipes beside it. The part of the gas pipe that it's linked to is probably about 6 metres away from the main gas incomer. I always thought for gas and water to be earthed together it had to be on one continuous earth cable? So does this need to be marked down and if so what code?