Bit like a mate from Cornwall, while in Spain, having explained to him the Spanish concept of Mañana, he said, in Cornwall we don't have anything that urgent.
Sorry Paul, I have to take issue with you on this.
There will be no bonding at the pedestal, what you are measuring is the bonding at the supply 11kv*, star/delta transformer where the star point neutral is bonded to earth.
In some installations, there will be a very low value neutral...
I've been 'playing' with home assistant for a few weeks, the intent was to monitor loft & outside temp/humidity, HA runs on a RPi4, with lbe thermopro sensors, it's morphed into a central heating monitor, running on a RPi pico.
Got me back into coding python, but the HA .yaml config is a pain...