Where should earth-neutral bond be

[recre8]

Hi Guys

Our small complex recently changed over from three phase coming in (and being reticulated from our kiosk to each property) to being supplied single-phase directly by the municipality. Our private contractor for some reason joined all the neutrals together on the old 3-phase neutral bus bar which definitely seems wrong... but my question is this:

In each of the houses, the inspection/junction box on the outer garage wall where the house's mains cable is joined... there is a earth bar which bond neutral and earth again. From my understanding, the neutral-earth bond should only be done ONCE at the point of supply (meaning the kiosk outside the complex, or at the minisub?) and nowhere from there up to the house where there should be a separate neutral and earth? The area is relatively new and from what I remember there is definitely an earth-neutral bond in the supplier's kiosk. Why would the electrician have bonded the earth and neutral again at each house? I've attached a photo

Note: I had two CoC's done in recent years and both passed. The one ticks the earthing arrangement as TN-C-S and the other CoC has it as TN-S?