To be fair, traditionally 95% of digital content has zero amount of typographical finesse and simply uses whatever is available in the local standard keyboard layout. Even the use of em and n dashes is a big deal.
The decimal currency in the UK is essentially the same age as me - and I have never heard this claim that an interpunct is somehow more official. So the claim stood out to me as being outlandish; not impossible, just super unlikely.
To show I have no ill will toward outlandish Britishisms, this one applied in Parliament until relatively recently...
"To increase their appearance during debates and to be seen more easily, a Member wishing to
raise a point of order during a division was, until 1998, required to speak with his hat on.
Collapsible top hats were kept for the purpose."
Yeah, I don't doubt you, just meant that web copy is usually so typographically impoverished compared to print that it's not in itself much of evidence.