Complex sentence: The Local Government Act 1972 retained civil parishes in rural areas, and many former urban districts and municipal Boroughs that were being abolished, were replaced by new successor parishes; urban areas that were considered too large to be single parishes became unparished areas.
Split into simpler sentences: The Local Government Act 1972 retained civil parishes in rural areas, and many former urban districts and municipal Boroughs that were being abolished, were replaced by new successor parishes. Urban areas that were considered too large to be single parishes became unparished areas.