This morning, boxes 3 and 5 had brief visits between 7.15 and 7.30. Then at 9.34 box 3 swift had returned and brought a friend along too! They spent some time cuddling up together and mutually preening, and left again some time before midday.
Here is a short video of the swiftlets in box 2 this morning. They are now starting to be more active and have opened their eyes.