Since 2018, UK law permits specialist doctors to prescribe cannabis-based...

https://josuedumv023.tearosediner.net/why-are-most-medical-cannabis-prescriptions-in-the-uk-for-unlicensed-products

Since 2018, UK law permits specialist doctors to prescribe cannabis-based medicines classified under Schedule 2, including Sativex and Epidyolex, despite cannabis remaining a Class B drug