Well, Jo, possibly the signs were shipped from the States; I don't know. I will say that I have been told by a beloved Brit-speaker that I ought to learn to speak English! But maybe I should tell him to learn American: recently he used a slang expression that HE thought changed the antecedent insult to show that he was making a joke. Instead, though, it served to emphasize the seriousness; quite rocked me back on my heels, till I asked, I can tell you.