A company called BAA operates Southampton, Stansted & Glasgow, but this is its busiest airport
The 
company had previously operated seven airports but an inquiry by the... [DOC] [TLE] Aberdeen, Glasgow and Southampton airports sold in 1bn deal ... [PAR] Oct 16, 2014 ... Aberdeen, Glasgow and Southampton airports are sold by owners Heathrow 
Airport Holdings ... Ferrovial already part-owns Heathrow, the UK's busiest airport
, and holds a 25% stake in HAH, which was previously known as BAA.