Complex sentence: The Westland Sea King was updated and adapted for numerous roles, subsequent variants include the "HAS2", "HAS5" and "HAS6"; changes from initial production aircraft included an expansion of the cabin and upgraded engines.
Split into simpler sentences: The Westland Sea King was updated and adapted for numerous roles, subsequent variants include the "HAS2", "HAS5" and "HAS6". Changes from initial production aircraft included an expansion of the cabin and upgraded engines.