No, that Pied Flycatcher is not in a cage, it's on the other side of the fence along the undercliff.
Being protected from humans by a high fence, it was unconcerned, and spent time on the outside twigs snapping at bugs - it posed a challenge for photography though.
Then it was joined by another bird - a Lesser Whitethroat? They stayed close for a while, although turning their beaks up at the nearby blackberries.
There have been numerous reports of migrating Pied Flycatchers this week, as well as Spotted Flys, Redstarts, warblers etc and it's the second for me this autumn.