I'm with you on that barn, a formality the developers go through.
I would like to help with something I keep hearing over and over with the dredging. The low silt dredging is a joke. Its put forth as if its OK if it doesn't silt. Thats sort of like I wont make a bloody mess when I cut off your nose so it will be OK. Your nose is still going to be gone!
The seabed breaks the force of damaging waves approaching the island remove it and the island get the impact of the destructive wave.Three elements stop the island from washing away. The reef, the sea bed and the beach. Poison the reef , dredge the sea bed, destroy the beach with a sea wall and watch the island erode away.