main earth terminal

So this is my supply at my new property and when I first saw during a house viewing back in July and before I gave it any real attention, I thought it was TN-C-S. Then a EICR later on I had done said it was TN-S, making me think it was split concentric and TN-S due to where the main earth...

I currently have a bond to the MET on my gas pipe, as per gas regs. There is no bonding on the rising main, which comes in in MDPE before switching to copper at the stop valve. The pipes at the boiler are cross-bonded. I have a TT installation with an earth rod, a Wylex NS consumer unit, and a...