As I said yesterday, I set the system so that it started at 5:30am this morning to make sure I didn't miss anything. I needn't have bothered as none of the chicks left the nest box early.
That was just as well as the early photos were spoiled by what looks like condensation on the camera lens. Fortunately, it seems to have evaporated fairly quickly as the camera is warming up following it being switched on. I've never noticed this before but normally the cameras come on at 7:30am and by the time I have started the system some time after 8am, the trouble has cleared.
Here you can see that all the remaining 8 chicks are present, and that one of them is looking out of the exit hole.