In reply to Andy Hudson:
No idea of the routes you mention...
But my experience has been, that if you can cope with a long shafted axe (longer than 50cm technical tool)... well simple hiking poles or in extreme cases a self arrest pole (Grivel Kondor or BD Whippet) is enough.
Hence, I don't own a mountaineering/glacier axe... only ice tools (Vipers) and a Whippet (plus adjsutable poles).
Do bear in mind, that I don't climb in Scotland but in the Alps, US or Scandinavia... And most of the time it's with skis (hence Whippet).