Complex sentence: The Abercrombie Plan for London in 1944 proposed a New Town in Hatfield and it was designated in the New Towns Act 1946, forming part of the initial Hertfordshire group with nearby Stevenage, Welwyn Garden City and Letchworth.
Split into simpler sentences: The Abercrombie Plan for London in 1944 proposed a New Town in Hatfield. It was designated in the New Towns Act 1946, forming part of the initial Hertfordshire group with nearby Stevenage, Welwyn Garden City and Letchworth.