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English: Welham Green is a village in the parish of North Mymms, Hertfordshire, England. It is situated close to the Great North Road coaching route that used to run from London to York and the north. The Great North Road is now by-passed by the A1(M). Even so, Welham Green has developed into a large village over the last 20 years, helped by the 1986 opening of its own railway station between Brookmans Park and Hatfield on the East Coast Main Line. Recent housing development has portended the joining of the village with the neighbouring town of Hatfield. Some residents, wishing to maintain Welham Green's character, have resisted such development.