You can get them but it requires a real fight with your CCG. The Libre 3 isn't prescribed in the usual way. It is provisioned by hospitals through supply chain, meaning that the funding stream is completely different. Certainly where I am, Surrey Heartlands are absolutely against paying for medical devices for Type 1 diabetics. They are dragging their feet over everything.
We finally got my daughter onto Libre 3 just before Christmas. Now the fight is for Omnipod 5 which Surrey have decided is too expensive. Ironically, because Abbott are so secretive and weird, for Omnipod 5 we will have to switch to Dexcom 6.
It amazes me that Abbott seem to have so little marketing smarts. We were able to try a Dexcom 7 just by buying one. To try a Libre 3 I had to purchase one from the USA, have it shipped to a reshipping address then use an old jailbroken iphone to install the US version of LibreView. It's just insane. The UK Abbott people know nothing about anything, whilst the Dexcom people know everything about everything.
Have a Dexcom and want to view data on your smart watch - easy. Libre 3 - you have to resort to back doors and third party tools.