In reply to Tom Last:
There wil certainly be some old 'alpine' snow to be found on most of the mountains in the route, but i dobt its a continuous snow ridge. The ben summit is very snowy, The CMD arete is mostly bare rock but you could probably stick to old snow for most of its length if you dropped just below the crest, the aonachs are probably still linked by snow, after that it is only guess work on my part but i still expect substancial snow buildups in places along the length of the grey corries but also expect allot of bare rock.
there may also still be fresh dustings of snow over the summits and it is still staying failry cold up high.