In reply to Paul Sagar:
> Barbarian is amazing but also an absolute monster.
Beta alert!
When I first tried this, I got through the roof OK, reached the ledge to traverse left, started to foot-traverse it, found I had no handholds at was unable to stop myself toppling slowly backwards, I hit the slab below first with my feet which then inverted me, so the back of my head (fortunately inside a helmet) slapped into the slab. Not too hurt I took a breather, got back on and fell off again in exactly the same place. Barbarian 2, MK 0! At this point I decided enough is enough and abseiled off. Ontaking off my helmet, I found a 2 inch crack in the back. (Old style, 1970s fibre glass helmet.)
Fast forward a couple of years, I decide on a rematch. Through the roof, got to the ledge going left, hand-traversed instead, no problem! (Note this was back in the 70s, so things may have changed.)