Original: Gatwick is owned and operated by BAA, which owns and operates six other British airports, UK airports owned and operated by BAA and is itself owned by an international consortium led by the Spanish Ferrovial Group.
Simplified: Gatwick is owned and operated by BAA, which also owns and operates six other UK airports, UK airports owned and operated by BAA including Heathrow, and is itself owned by an international consortium led by the Spanish Ferrovial Group.