The British Institute of Interior Design (BIID) was founded in 1965 as the Interior Decorators and Designers Association (IDDA). In 2001, the IDDA was amalgamated with the globally recognised International Interior Design Association UK Chapter (IIDA), to form the British Interior Design Association (BIDA). The Secretary of State recognised the BIDA as the pre-eminent body in the field in 2009 and granted Institute status so it became the British Institute of Interior Design. In 2015, the BIID celebrated 50 years as an organisation dedicated to the interior design profession, making it the UK’s oldest professional body representing solely interior designers.