Original sentence: The designated area of the AONB covers approximately half of the island (189 sqaure kilometres), concentrated around the south-west and north-west coastal areas and including an area of inland downland in the island's east
Edited sentence: The designated area of the AONB covers approximately half of the island (189 square kilometres), concentrated around the south-west and north-west coastal areas and including an area of inland downland in the island's east