 The financial success of these lines was beyond all expectations, and interests in London and Birmingham soon planned to build lines linking these cities together and with Liverpool and Manchester via the L&MR.These two lines were the London and Birmingham (L&BR), designed by Robert Stephenson, which ran from Euston Square, London, to Curzon Street, Birmingham; and the Grand Junction, engineered by Joseph Locke, which ran from Curzon Street to an end-on junction with the Warrington and Newton Line, a branch of the L&MR, at Dallam, near Warrington in Cheshire.The Grand Junction was designed to link the existing L&MR and the new L&BR; it opened on 4 July 1837, with the L&BR following a few months later.