That's meant to be the English version for rest of the world (non-UK, but there's some exceptions such as the US which have their own version), but incorrectly it'll still show even if you're on the UK version of the site.
BA IT is always a mess.
Here's the specific US version https://www.britishairways.com/conte...h-airways-club
It's also saying credit card info coming soon for them too.
Remember when Head for Points is just speculating about US earning unlimited tier points. They know as much as we do. They're often right, but they make their fair share of mistakes too.