Thanks to 'jhsp' for the Glenmore Lodge recommendation.
Just to let you know a bit more information about the courses. There are a couple of major differences between the winter skills and the winter mountaineering courses.
The skills course is more focused around movement in the hills, navigation and safety, all on less serious terrain and therefore not including any ropework. The mountaineering course moves onto steeper more 'scrambling' terrain (grade 1) and therefore includes rope work as a means of increasing the level of safety. It also includes more technical work with axes and crampons.
The second major difference is the ratios, winter skills courses are run at 1:6 whilst the mountaineering is 1:4 due to the more serious terrain it involves. These ratios would be pretty standard across most providers unless it was more of a 'private' booking, which could cost you a lot more, particuarly once you've added food, accommodation, equipment, etc.
For the mountaineering course we would require you to have previous experience of winter walking and ideally some summer scrambling experience. One possible solution to best meet your needs would be to attend a 2 day winter skills course, followed by our 1 day avalanche course then a 2 day winter mountaineering course. This 5 day package is available for most weeks throughout the winter and should then cover all of your requirements.
Our winter brochure is available online at
http://www.glenmorelodge.org.uk as are all of the course notes for these courses to help you to choose.
Whoever you decide to go with, have a great time.