The extension is 7c.

ClimberDateStyle
Rich Kirby 25/Aug/14 Lead O/S
with Helen
Kris ?/Jul/14 Lead O/S
Voting
High 7a
Mid 7a
Low 7a
High 6c+
Mid 6c+
Low 6c+
High 6c
Mid 6c
Low 6c
Votes cast 1