Santander UK Group Holdings PLC operates as a retail and commercial bank in the United Kingdom, providing a range of financial products and services including personal and business banking, mortgages, credit cards, and savings accounts. The bank generates revenue primarily through net interest income from loans and mortgages, as well as fees from various banking services. It serves a diverse customer base, including individuals, small businesses, and corporate clients, and operates through a network of branches and digital platforms across the UK. The recent acquisition of TSB has expanded its customer base and branch network, enhancing its market position.