In reply to David Cowan:
> On the logbooks there is an unambiguous warning to stay away from the crag because of a Kestral nesting.
No there isn't. There is a dated observational comment that in late May this year a Kestrel nest was present and to avoid climbing at that time. Have you messaged the UKC crag moderator to ask for an update?
The more general restriction ends in July, though as others have posted if you find there is a bird nesting you should generally back off rather than disturb it, at any time of year.
Most Kestrels start nesting in late April or early May, incubate for 4 weeks then fledge another 32 to 37 days later, so should have fledged and gone by mid July and a second clutch is very unusual.
Since the agreed "bird ban" has finished, the Mountaineering.scot site lists it as "green" and the May birds are almost certain to have gone you are free to climb, unless you find birds nesting when you arrive.
Post edited at 17:37