Scotch whisky company The Edrington Group saw its turnover jump 6% in its full year results for 2002 to £200.8m, compared to £188.4m in 2001. Profit before tax increased by 12.8% to £49.5m, from £43.9m.   Strong performances by Edrington's four key brands - The Famous Grouse, Cutty Sark, The Macallan and Highland Park - in particular in exports, drove the results the company said.