Well now that you've mentioned that...
When I first read your comment I thought "That's odd...I was sure there's something problematic with sensor activation via app" and then I read the rest of the comment.
I'm not in the UK, but my sister lives there. I suppose this means I would have to pay the higher price ( I wouldn't get the reduction you've all mentioned), but I'm fine with that since I can't buy libre at all in my country (not online, not in pharmacy).
As for the sensor activation, I'm sure there's some problem with apps I would use, but honestly - I'm not sure what the exact problem is and I would have to look into it again in order to find out.

Possibilities are:
1. Libre link app isn't available in my country and that's the only app that can be used for sensor activation.
2. I would need to set up a new kind of bank account in order to be able to pay for the app online and I just don't have time in my life for that right now (maybe later).
3. Libre link app isn't available for the phone I currently have (and this I know for sure because I looked at the lists of phones that are compatible). I could buy a new phone, but not immediately.
4. It's possible that I only considered using the apps that work with nightrider and miao miao (because if I'm satisfied with libre, I'll try to get one of these) and it's possible that libre link app isn't one of them.
Anyway, I think that's where the problem is - the difference between official app and similar ones.