I got my first notification from aura that I was getting a bill.
I ignored it as thought it was a scam - I'd never even heard of aura, and certainly didn't associate it with O2. Why would something I'd never heard of send me a bill?
I had to make a search to see what it might be, then come onto this forum to get some detail.
Seems daft to use aura without prior advice that our O2 notifications which we've had for years are changing. Especially when we're being warned about an increase in scams during the coronavirus.