Bit late to ask really but sod it I'm asking anyway. I did the 2391 written exam in Oct and like a biff wrote to disconnect the earthing conductor at the db (I know! I must have been dreaming about testing the Ze, biff!) instead of main bonding conductor when Testing the main protective bonding. My question is, the answer is written in list form with 11 marks being awarded. Will I lose all the marks after writing the wrong conductor or just that mark?