Tandem Bank is a UK-based digital challenger bank focused on sustainable finance. It offers services such as savings accounts, mortgages, personal and secured loans, and green home improvement loans. The bank targets environmentally conscious individuals and homeowners. Its unique selling proposition is its commitment to green lending, having issued over 230 million in green loans since 2021. Tandem aims to help customers reduce their carbon footprint through its financial products and the Tandem Marketplace, which provides resources for energy-efficient home improvements[1][3][5].