Spotted Flycatcher query

The pair nesting in the wood burner flue at Denmark Farm have successfully raised at least 2 young which look close to fledging. Once they have flown are they likely to return to the nest to roost for a while? I ask since folk are coming to camp this weekend and in theory are expecting to use the burner. Shame the field trip had to be cancelled. Due to a misunderstanding on my part when I read the blog post I initially thought that the big, powerful Bertha who had caused the trip to be cancelled was a member of the Ceredigion birding community that I had yet to be acquainted with.