Thanks for confirming that this is a blank.
I had noticed the exposed copper on the large conductor, this is one of the less significant bad practices that this installation is full of!
As I am new on here I cannot post a picture, but would like help identifying a module in a consumer unit. I will try and describe the item.
Merlin Gerin Consumer unit in large house ~30 years old with multi9 mcbs. At the end of each of the two live busbars next to the mcbs there is an unmarked...