[OJFord]

> water authority and, since they are mostly publicly owned

Not here:

https://en.wikipedia.org/wiki/United_Kingdom_water_companies

(E.g. Canada Pension Plan, Morgan Stanley, Hong Kong based investment trust)

As I said, it may be a regulatory (Ofwat) requirement, but it isn't just a public body doing right by its citizens.

Interesting anyway, not that much of it means anything to me. Though apparently if/when I try brewing beer again I should add some magnesium. (It even lists the range that's helpful as a yeast nutrient, and above which contributes unwanted taste.)