No, I actually downloaded the update while in the UK and this is definitely not a beta build because I never signed up for beta. When I'm in the UK using my mobile network, it shows 4G. The R there is cos I'm currently outside the UK. Maybe I got the update cos my s9 may not be the UK version (I think it's EU?) Idk.
Wait so there's actually a UK version? Thought the EU version covers the UK, just like people in the US get the snapdragon variant while UK/EU gets exynos. I'm I missing something?