Can or will the Court of Session grant an English QC permission to appear in an appeal from the Upper Tribunal (Tax and Chancery Chamber) where the tribunal sat in Scotland and she acted for one of the parties? The answer is No; she has to join the Scottish Bar first.
Legal historians will be interested to see that this answer involves discussion of the standing of the College of Justice Act 1532 today, and of the continuing significance of the concept of the 'college' as reflected in modern practice.
The discussion includes a reference to a Stair Society publication, Hope’s Major Practicks, Stair Society, vol 4 (1938), ed Clyde.
You can find the judgement here: http://www.scotcourts.gov.uk/search-judgments/judgment?id=9a03d4a6-8980-69d2-b500-ff0000d74aa7
You can find out more about Stair Society publications here: http://stairsociety.org/publications