I watched hours of recording for Wednesday to Thursday night, and it appears I was really lucky to see the first egg at 6:11. She left the nest ledge at 12:39 and waited 18 minutes outside the nestbox before going in. From then on, until 6:08, she was pretty tight on that scrape, only allowing a very short glimpse of the egg at 5:43. The tiercel made brief visits at 5:25 and 5:38, which didn't stir her up.
The video below shows the moment she gets up at 6:08 revealing the egg and shortly after the tiercel coming round the corner to have a look: