EV commercial installation

So this is the resistance between the neutral incomer to a EV feeder pillar from the TNCS intake and the disconnected end of the TT earth electrode also at the pillar. 28.5 ohms on the low resistance ohmmeter scale. 
Intake is about 12m away but a well earthed steel perimeter fence about 1m away. No Open protection. 
The installation is one of several in the car parks of several sites belonging to a car sales group, all displaying similar results. 

So this is the resistance between the neutral incomer to a EV feeder pillar from the TNCS intake and the disconnected end of the TT earth electrode also at the pillar. 28.5 ohms on the low resistance ohmmeter scale. 
Intake is about 12m away but a well earthed steel perimeter fence about 1m away. No Open protection. 
The installation is one of several in the car parks of several sites belonging to a car sales group, all displaying similar results. 

So the fence and the DNOs earth in series manage 0.9 ohms and the TT electrode to the plate at the end of the universe is then a touch over 25. Luckily there is no fault condition that pushes current into the TT earth electrode that would not operate ADS before the touch voltage to terra-firma was significant.

So what exactly is the concern here - is the box with the intake in earthed to the TT electrode, and is anything electrical bolted to the fence?

Not sure what cutting L, N and an TNCs Earth you are not using if the L-N voltage goes adrift would achieve?

I have a feeling there is some terrible fault mode I have not seen.

Mike.