This morning the third egg was expected on Nest 4. 69 incubated briefly a couple of times and Mrs 69 had to fend off an unringed intruder.
Mrs 69 settled down again until at 11.05 she started to fidget and stood up. At 11.08 she sat and contractions could be seen even through the misted camera lens. The next time she rose three eggs were visible. The official time of lay is 11.09.
Here’s a video of the final minutes.