Bit odd this seeing as Hoo Island is already used as a dumping ground for extracted soils etc and used as a waste management site so this in itself is not a new initiative and certainly not the creation of a 'new bird island'. It's already used by winter migrant waders who feed off the mudflats (what will happen to those if it's covered in grass?) so I cant see how the species they mention will benefit from the provision of nesting areas. I presume it will continue to be used as a dumping ground for the dredgers that use the Thames estuary too.
One other minor point, surely with sea rises, high tides and the tendency for flooding in the Medway, how long will any ground nesters last anyway I wonder? The 'island' is almost completely flat and already crisscrossed with water channels! (Incidently, it's private property so not sure what the access will be like especially as it will still be a waste management site)
More here:
Medway Ports | Waste Management