July 2 (so far)
Someone flew up to the ledge and then immediately turned around and flew off - looked like a chick but couldn't tell who. Didn't stay for 5 seconds. That was at 0345h.
Next visit was the same at 0452h and same deal, might have been McDermot but still not enough light to even see if it had a backpack or antennae, but the size looked like McDermot.
At 0636h, Hart turned up for a minute or two before taking off again.
All were at the ledgecam end of the ledge, nothing at the nestbox or further down the ledge. And no one spent the night. All quiet since Hart left