I went to look at a system today, a house with a granny flat attached, separate supplies, meters, boards etc, no gas or oil into either property but when I looked at the water the main house had bonding where it came into the property but the flat didn't. On further investigation, where the water comes into the main house it branches of through the wall into the flat ( approx distance of 2 feet ), the flat water pipes are effectively bonded to the main house board. Not sure how to go about this, if I install bonding from the flat board to where the water comes in the flat i will be "linking" both boards together!! If i leave it as it has been for years how do I fill out the paper work as it will have no bonding. Has anybody come across this or can anyone with better knowledge than me help me out.