The Great British Beach Clean is an annual event organized by the Marine Conservation Society (MCS) in the United Kingdom. It encourages volunteers to help clean up beaches and collect data on litter found along the coastline. This initiative aims to raise awareness about marine pollution and its impact on wildlife and ecosystems. During the event, participants gather at various beaches across the UK, picking up litter and recording their findings. The data collected helps the MCS understand the types of waste commonly found and informs efforts to reduce plastic pollution in the ocean.