OP
JamieK
In effect what you are asking is: "Is it OK to earth SWA armour only at the destination, provided a copper core in the cable connects the destination to the source?"
I assume when you say MET in the left hand board, you mean the earth bar: The MET is at the origin. You have to start asking specific questions: What is the Zs and what protection is offered to the cable? What is the method of earthing and is the submain arrangement satisfactory as far as extending or exporting the equipotential zone is concerned? I don't think it is a plain yes or no kind of question.
Thanks for the reply you are right that I should have stated the earth bar on the left hand side, I don't know what the zs is but the earthing arrangement was TNS. Looking it this I don't see how a sage disconnection would occur if the cable got damaged especially damage to the internal earth cable in the SWA. If you inspected this install you would have concerns wouldn't you?