In reply to CurlyStevo:
It's nearly up to date... once while seconding I fell off, taking s swing and the rope rubbed across gritstone bulge, cutting through most of the sheath. I was lowered off as the belayer spotted the cut.
While absailing on slate, similar kind of damage, didn't know untill we pulled the rope, this was abing off a dedicated bolted ab point, there were edges but nothing major or so we thought.
Then the third time with an instructor, this wasn't a cut through to the core but I was on top rope and took a fall with a very small swing, I was looking up at the rope and witnessed the rope turn into a pipe cleaner when it came in contact with the rock.
All the ropes were decent single ropes.