New expressive voices - no British option?

[martin2345uk]

I can choose the new expressive voices, pace etc, but I can only have American accents it seems, is this a feature still waiting to fully roll out?
I have nothing against American accents by the way 😂

 

[HouseLannister]

It seems to be the only one available for testing. My wife wants her almost southern drawl Matthew-McConaughey-esque choice too. It is marked as an "early preview" within the Siri Beta, which is within the iOS 27 beta, so no idea when the feature will be considered finished. Might not get more accents until 27.3 or later, I wager.