Busy tonight - so I avoided the main area. Went and had a wander to the lesser frequented areas.
Quite a few sets of birds nesting at different spots along the crag.
Two separate sets on the right hand outcrop (in Peepod and The Corner). Parents were circling - not sure if they were ravens or crows.
Another set on the left hand outcrop (in Nameless) initially thought they may be bats due to the sound - not so certain now. Possibly ravens as well.