From the 2026 Senedd election, the D’Hondt formula will be used (this formula has been used to determine the Senedd’s regional list Members (Senedd reform: a glossary).
mewn perthynas â’r adolygiad symlach i baru 32 etholaeth Seneddol newydd y DU cyn etholiad 2026 y Senedd (i ffurfio 16 o etholaethau newydd ar gyfer y Senedd)