2 recorded ascents.
http://www.jamesmchaffie.com/caffs-blog/choronzon-e10-7a8b
https://www.youtube.com/watch?v=HNbHJjqOQjY
~8b+.
https://www.thebmc.co.uk/pembroke-demon-route-slain-by-strong-steve-mcclure
https://www.youtube.com/watch?v=WTYhmGlxpnw