In reply to r.king:
Depends what you're looking for - mainly mountain safety then a Guide or MIC (plus relevant touring award) will probably be your best bet:
- Di Gilbert, Heather Morning, Richard Bently: all freelance (I think!)
- John Jackson: runs the outdoors activities side of Falkirk Community Trust and leads lots of ski trips. There will be plenty others...
If you're mainly looking for ski technique with some additional mountain skills, then Off Piste Performance is very good.
If you're organising this for a club, the MCofS runs a two day course for those who 'lead' club trips...