Nope, other sister fledged late yesterday - that is little brother, he's been up and down the ledge by the nestbox and I think he may well have voluntarily fledged as well, but can't be sure as if he did, he did it off camera! We'll see what he gets up to over the rest of the day. And the accidentally fledged sister has found somewhere new to perch - can't find her on the building she was sticking to now.
I've got the skycam keeping an eye on the ledge, the balcony cam watching the balcony and the inside box came, well watching the inside of the box - theoretically if someone comes or goes we should see it!!