The fact that his original, long term, partner hasn't returned to the nest this year, seems like the male might be ready to move out too. There was a brief visit from a new, younger female, but i'm not sure if she's been accepted. Looks like a summer of no show.
https://scottishwildlifetrust.org.uk/things-to-do/watch-wildlife-online/loch-of-the-lowes-webcam/