Purgatory Lost

Just left of Chuffer Chimney. Pleasant laybacking up the thin flake feature for a few metres - take care to place cams where LHS flake is thickest and deepest. When the flake starts getting really thin (first ascensionist punched a good amount off), move up by sidepulling arête on right and RHS edges of crack. Join top half of Chuffer Chimney. Save a BD #4 cam for the top slab just in case something goes wrong.