John and Benjamin Green were a father and son architectural practice active in Newcastle. In 1841 Benjamin Green had proposed a high level bridge for road traffic, substantially on the alignment of the actual High Level Bridge; and sensing the commercial climate he explained how it could be adapted for railway use. He failed to get any financial support, but in 1843 George Hudson was looking for ways to extend his railway network northwards, and the Greens' scheme fitted with his takeover of the Newcastle and Darlington Junction Railway; the line got its authorising Act on 22 May 1844, and the Act included the road bridge.