The government chief scientific adviser (GCSA) is the personal adviser on science and technology-related activities and policies to the prime minister of the United Kingdom and the Cabinet. They are also the head of the Government Office for Science. Since 2023 Dame Angela McLean has been GCSA.
Many individual government departments have departmental chief scientific advisers (CSA). The GCSA is involved in recruiting CSAs, and meets regularly with CSAs to identify priorities, challenges and strategies. The adviser also usually serves as chair of the UK's Scientific Advisory Group for Emergencies (SAGE).