Earth leakage on sockets

[captaincaveman]

I'm sticking by my previous conclusion.
I'm thinking if the bonding was disconnected you would have 230v between the bars as I don't think you have a neutral.
Turn the main switch off and do a l-n loop test on the incoming side.
That will soon tell you.
Rather than guessing at different voltages.

Sorry rich. just seen this. I will put it on my list to check. cheers