Complex sentence: Most of the workers for these mines came from traditional coal areas such as south Wales, the Midlands and the North East and to house them new villages were built, including Aylesham, Elvington, Hersden and Mill Hill in Deal.
Split into simpler sentences: Most of the workers for these new mines came from traditional coal areas, including south Wales, the Midlands and the North East. New villages were built to house them, including Aylesham, Elvington, Hersden and Mill Hill in Deal.