20m. Start directly below the arete with the borehole. Move up L to ledges and gain a good hold above. Move round the blunt rib to the R and climb its R side with difficulty to better holds. Move diagonally L then traverse L round the arete keeping below (and off) the undercut flake, which seems unsupported and fragile. Move easily up to the open groove just L of the borehole arete and climb it via a hard move onto a big foothold. Move up and reach R to the lower-offs.
Colin Struthers, Harold Walmsley 31/Aug/2010