What is Coinbase UK?

Could you elaborate on what Coinbase UK is and its significance in the cryptocurrency and finance landscape? I'm particularly interested in understanding its role as a platform for buying, selling, and managing digital currencies in the United Kingdom. Additionally, I'd like to know if it offers any unique features or services that set it apart from other cryptocurrency exchanges. Could you also provide some insights into its security measures and user experience? Your detailed explanation would greatly assist me in understanding the value and function of Coinbase UK.