I may have done it many years ago, but the name is not familiar. All rock climbs on Crib Goch north face were pretty loose from my recollection and this was reflected further west above Cern Las, yet the good snow and ice conditions in the 1960's made this area very climbable. If exposure makes you nervous, it is well to bear in mind that a friable surface will augment this. Pete Crew refers to this in his guide Snowdon South.
Main Wall in the Cern Las is a classic climb (Hard Severe), more because of the exposure it puts the climber into than technical difficulty, the experience can compare with Alpine climbing though for a very short distance. My guess is that it is this experience that is giving this route some popularity in recent years and a name.
Sorry on wrong side of the hill, we came down it after doing the Trinity gullies in snow, beautiful way but as it was under snow I can be of little help to the underlay. Yet I never felt that the exposure on Lliwedd so as ferocious as where I have just described.
