John Ward has an interesting video about the British TN-C-S grounding system. This is where the utility delivers Line and Neutral, and the dwelling does not have local ground rods and takes ground off of neutral. It's very similar to North American dryers and ranges pre-1996, or pre-2008 subpanels inside the same building. Now outlawed.
At the end John comments that this would never be used outdoors or at dockside / marinas.
So how is the grounding/earthing done for a dockside supply, say your house is along a canal and you have a boat?