In reply to Gazmataz:
'Introductory' winter courses can vary in my experience. I did 2 in the same year (I wasn't sure if I'd get a place on the Conville one, which was ran out of Glenmore Lodge, so I booked onto the Martin Moran one as well and ended up doing both).
The Glenmore Lodge one was pretty un-spectacular. We mostly went up onto the plateau and worked on various techniques under great instruction; practiced nav, judgement, belays, walking in crampons, avalanche-awareness, ice-axe arrests, various techniques, etc.
The Martin Moran one we were guided up some spectacular routes and mountains around the NW Highlands and had a pretty epic experience during the week but learned very little.
If you want to learn the skills so you can go out and be independent, I'd recommend Glenmore Lodge or similar.
Super-reliable conditions in the Cairngorms as well. You could go to Fort Bill and get rained on for 3 days.