Name ONE Public Service Broadcaster in the UK other than the BBC.

Channel 4 is a public service broadcaster in the UK that operates with a unique remit distinct from commercial channels. Established in 1982, Channel 4 aims to provide innovative and diverse programming that caters to a wide variety of audiences. It is known for its commitment to diversity and different perspectives, often producing content that challenges the status quo. Its funding model, which relies primarily on advertising instead of public funding like the BBC, still enables it to fulfill its public service obligations, such as educational programming and promoting equal opportunities in broadcasting.

When comparing it to other options, ITV is primarily a commercial network, Sky News is part of a commercial enterprise under Sky, and Channel 5, while reaching a broad audience, operates mainly as a commercial channel as well. These networks do not have the same public service mandate that Channel 4 upholds, which emphasizes its role and significance in the UK's broadcasting landscape.