Hmmm. I’d like to just say ‘yes’ - but that’s not realistic. I think most of the ones we monitored fledged in the morning - between 6.45 (that’s a month ago) and 10am? They also fledge in the evenings - say, between 5.30 and 8? Hard to predict exactly when they’ll go. Good luck!
@HelenCross, this bird is definitely a juvenile, but I don't think it has entered post-juvenile moult yet (looks like reasonably fresh plumage), or if it has, it isn't very far along.