So, that camera has always been on the lock screen? I always thought it had to be accessed from the control centre, and that's what the little icon in the corner was for. I can't go back to IOS9 to check now 
If so, then switching off the control centre has been a waste of time! When will they ever get it right.....
If so, then switching off the control centre has been a waste of time! When will they ever get it right.....