A local group of protesters have been joined by specialist environmental lawyers to stop plans to build a £100m marina on Holyhead's coastline.
The Newry Beach Holyhead Waterfront Action group say the creation of apartments and leisure facilities will destroy the town's historic coastline.
The group with the help of the lawyers have applied to Anglesey County Council to have the area registered as a town or village green under section 15 of the Commons Act 2006.
Around 4,000 people have signed petitions in opposition to the plans.
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