The Marine Conservation Society (MCS) works on several programs to protect UK seas including fisheries management, reducing marine pollution, and monitoring marine species and habitats. Through their Beachwatch program, over 110,000 volunteers have collected litter data along UK coastlines. This data has helped pass policies like single-use plastic bag bans. MCS also runs a citizen science diving program called Seasearch that collects species and habitat records to help identify and manage marine protected areas. The document describes a case study where MCS used a community engagement method to facilitate stakeholder workshops on managing the Kingmere Marine Conservation Zone off the Sussex coast.