Pretty sure this and possibly Bone Machine were done by Gaskins, just awaiting his reply. I remember him telling me he did at least two traverses and possibly some other up variants.
A word of caution when reporting new stuff at Fairy Steps: the guide is old and even at the time it was missing a number of things. This is one of Gaskins' favourite crags and he climbed here very extensively. Before I climbed Mook Squad I specifically asked him about it and he verified that he had not climbed it.
In future, it might be worth people double checking before putting stuff up on here, Facebook etc. I realise it's perhaps partly my fault for not re-doing the Fairy Steps guide, thus the area isn't as up to date in terms of history and the recording of lines as most other LakesBloc covered venues.
Cheers, Greg