The Welsh ministers have issued directions to the NHS in Wales on implementing NICE technology appraisal guidance. When a NICE technology appraisal guidance recommends the use of a drug or treatment, or other technology, the NHS in Wales must usually provide funding and resources for it within 2 months of the first publication of the final draft guidance. When NICE recommends a treatment 'as an option', the NHS must make sure it is available within the period set out in the paragraphs above. This means that, if a patient has completely resected stage 1b to 3a non‑small‑cell lung cancer that has an epidermal growth factor receptor exon 19 deletion or exon 21 (L858R) substitution mutation, and the healthcare professional responsible for their care thinks that osimertinib is the right treatment, it should be available for use, in line with NICE's recommendations.