@JBRJBR Thank you. I'm very grateful for your help and explanation. John.

When I go to bed I ensure that the camera is set to HQ (high quality), yet in the morning I find it has reverted to LQ. I have set the camera to reboot, not at the default time of midnight - 0030,...

I have a query regarding my powerline adaptor, but cannot find the AV 600 model on here, which prevents me from posting!