
I recently did a REC course (Rescue Emergency Care) and it was specifically geared to outdoors accidents rather than how to tie nice bandages etc (although it does cover some of that as well). It did cover things like CPR but in a typical outdoors setting and emphasised common sense really. There was an amount of role play involved which was fun as well as useful and enlightening (orange bivi bags provide sod all insulation from freezing cold ground - I was a very cold casualty!). I did the two day course and really enjoyed it. The REC certificate is valid for things like SMBLA, mountain leader qualifications etc.
There are various courses run around the country, just google for "REC First Aid" and you'll find some. The first Aid courses at Plas Y Brenin are run under REC so its good.