It should be pointed out that it has not been called Main Equipotential Bonding since the 16th Edition was replaced by the 17th Edition. The correct term is now Main Protective Bonding.
If there are extraneous conductive parts and there is no Main Protective Bonding to these then the installation is unsafe and no electrical work (no matter how small) should have taken place without correcting this.
If there are extraneous conductive parts and there is no Main Protective Bonding to these then the installation is unsafe and no electrical work (no matter how small) should have taken place without correcting this.