My bf lives in the Western Isles, but he's been looking at driving schools in Glasgow that offer intensive, week-long courses. I think the one he's decided to go with is called Happy Hour. It was recommended by his local driving instructor, as that's where he went for his instructor training. If they train the trainers, they must be good. :p I got the impression they were a chain of some sort, so you might find other locations.
You didn't mention where in Scotland you are, so this might not be an issue, but if you're in a pretty rural area, the only thing I would suggest is to find out from any instructor you hire what their availability is like. Bf's local instructor has been very good, but the driving lessons are just a sideline business for him, so he just isn't available often enough. There've been a lot of canceled lessons, or 3-4 weeks between lessons, etc. Since bf needs his license asap, that just isn't working. Hence going to Glasgow for an intensive course.