Complex sentence: The Municipal Borough of Thetford, the Urban Districts of Diss and Wymondham and the Rural Districts of Depwade, Loddon and Wayland; combined to produce a somewhat more urban constituency than before.
Split into simpler sentences: The Municipal Borough of Thetford, the Urban Districts of Diss and Wymondham, and the Rural Districts of Depwade, Loddon, and Wayland. These areas combined to produce a somewhat more urban constituency than before.