Greetings Hob,
Kettlet Crag has only recently been discovered as a rock climbing crag. It's tucked away in a gully on the Oxendale side of Pike o' Blisco. The rock looks superb, but I've never been there. See the link below, and page down to Kettle Crag for photos of the delectable rock. Drool. http://www.frcc.co.uk/rock/newroutes/newroutes/langdale-gimmer.htm
I still kick myself about missing the cup-marked boulder.
Regards,
TE.