NICE – National Institute for Health and Care Excellence

Established in 1999, NICE is a UK arm's-length body that produces evidence-based guidance, clinical standards, and health technology assessments to help NHS practitioners and commissioners deliver optimal, cost-effective care. Key outputs include clinical guidelines, the British National Formulary (BNF), Clinical Knowledge Summaries, and technology appraisals — including a Highly Specialised Technologies (HST) programme specifically for ultra-rare diseases that uses a modified cost-effectiveness threshold. Its guidance underpins treatment decision-making across England and has secured NHS patient access to orphan medicines including gene therapies such as Zolgensma and Libmeldy.