We just had a potentially extremely dangerous accident in Wyndcliff, on the route "Gone are the days". A massive rock of 30-40 kg fell off from near the anchor, on the right, and hit the ground. The rock was so unstable that fell as soon as it was touched and there was no way to stop it. Luckily, everyone ran away after shouting and no one got harmed, but it could have end up really badly. After coming off the wall and cleaning the route, another rock fell from the same spot and no one was even climbing! This route is extremely dangerous and should be avoided, at least until someone goes up there and checks if there's any other loose rock that might fall.
I left a feedback for the route here, but I don't know how many people actually read it:
https://www.ukclimbing.com/logbook/crags/wyndcliff_quarry-2731/gone_are_the...
Here are some pictures of the rocks that fell (the book for scale): https://imgur.com/a/NkMJewj
After that massive boulder fell, the other rocks might even be more unstable and people should be aware of that. Who else can I email to make sure that no one gets harmed?