UK Should I get the main earth changed by the DNO?

[Snailspark]

I have been asked to upgrade a fuse board, however, when I did an initial visual inspection, I noticed the main earth from the DNO is unsheathed (TN-S), it’s strands that are clearly ancient!
I haven’t yet carried out any tests. Should I get the DNO to change the earth? Will they actually bother changing it? A new smart meter has recently been fitted and the tails were upgraded - should they not have replaced the earth then?
This picture shows the MET - the other cable is main bonding.
Any thoughts?

 

[neon1991]

at least you have something. British Gas changed my meter and forgot to put the main earth back. they upgraded the meter tails and tails from the henley block but completley forgot to put the main earth back in. I only noticed when I went to turn off the supply one day.

 

[Percyprod]

Meant re-terminated. Still a poor job though.