From CUGC Wiki
Due to UK CAA General Exemption E 4825, on the other hand, up until April 2020 no Part-FCL license needs to be held to fly sailplanes. Respectively, no training towards a Part-FCL for flying gliders is necessary - which renders Part-MED not applicable for all BGA training whose (immediate, direct) purpose is not the grant of a Part-FCL license. [National Regulations? probably not for gliders in the UK... have to look into ANO.] Though, nonetheless, for flying within BGA clubs, obviously BGA requirements needs to be adhered to.
=== BGA Medical Requirements in the UK ===