In reply to Hendofan:
mmmm... suggest you do make sure you are both well equipped, can both use axes and crampons properly and know how to navigate competently using map & compass on the Ben Nevis plateau. None of these skills are that difficult to acquire. All will, at the least, ensure you have a better chance of a pleasant day... they could also save you life.
PS - note totally sure of the wisdom of wanding the plateau. Others may clear up the rubbish/sorry, remove the wands, or you may wand your way over a cornice or down Five Finger Gully if you're not navigating properly in the first place. Whatever, take care and enjoy.
PPS - lots of good Guides around in the Lochaber area if you want to improve your winter skills.