The Defence and Security Accelerator (DSA), established in December 2016, aims to drive innovation within the UK defense and security sectors with a budget of nearly £800 million over 8 years. It provides an open call for proposals to address real-world challenges, supporting collaboration between industry, academia, and government, while ensuring intellectual property remains with the innovators. Current focus areas include personnel protection, situational awareness, communication technologies, and cost-effective solutions in defense operations.