However, this collection of electoral statistics at 2 March 2020 has been produced to support the Parliamentary Constituency Boundary review due to finish in July 2023.
Fodd bynnag, cynhyrchwyd y casgliad hwn o ystadegau etholiadol ar 2 Mawrth 2020 at ddibenion adolygu Ffiniau Etholaethau Seneddol sydd i ddod i ben ym mis Gorffennaf 2023.