Tom,
If power is derived from a private generator plant, then the answer is "Maybe."
But as far as regular PoCo service is concerned, it's a definite yes. Our Electricity Supply Regulations have required the neutral to be solidly grounded ("earthed" in British parlance) since at least 1930.
In the case of the old TN-S distribution system, there was generally just one ground connection at the xfmr. In the PME (Protective Multiple Earthing) or TN-C-S system, which has become increasingly widespread, there are multiple ground connections along the route.
(See the diagrams
here. )
[This message has been edited by pauluk (edited 10-05-2002).]
