Prince William arrived by electric bus at London's Guildhall for an event on climate change and environmental protection, joined by Mayor Sadiq Khan. He expressed optimism about existing solutions and referenced historical accountability. The Earthshot Prize, launched in 2020 as a 10-year initiative, has awarded £1 million annually to five projects, with reported outcomes including 18 million tonnes of emissions reductions and protection of 85 million hectares of land.