Good advice, Walrus; I've pleased many Canadians by such behaviour.

Sorry, Kevin; when I described prices in guineas as "posh" I was referring to their use in Oz. But you're right; this thread is about the UK situation, where only some of the Oz conventions overlap. As far as I know, no currency was minted in Oz in the early part of C19 (hence the holey dollars) and, while sovereigns may have been minted here later, I'm pretty certain guineas never were. Posh shops had prices marked in guineas and art auctions dealt in nothing else, which all ended with dismal guernsey.

Cheers, Rowan