Right a family friend want me to remove a consumer unit that is used as the heating board as it's all being done away as they are installing a combi boiler. So as the old domestic board is old fuses I'm going to replace it with the domestic board (mcb's). Now my question is do I have to make sure everything is up to regs once I do this, ie do I have to upgrade the main earth for the water to comply with new regs etc?