Update 13/08: Apple has pulled iOS 12 Beta 7 due to severe performance issues and lots of lag that users are having. We can expect to see it released again tomorrow. This could result in the public beta being delayed too. More as we get it.
Original article below: Just a week after releasing iOS 12 Beta 6, Apple has released Beta 7 with more changes and fixes - at the time of writing, Public Beta 6 has not been released.
Apple has removed one major feature that was talked about at WWDC17 - Group FaceTime. Although users saw no faults with it, Apple said the feature had been removed from the inital releases of iOS 12 and macOS Mojave, but will be coming back in a later release.
We are getting nearer to the final release of iOS 12, and Apple is working very hard to get a new beta out every week. We'll update the article soon, with any new features, changes and bugs found.