 In March 1835, the E&DR opened a branch (authorised by Act of 4 June 1829 from Niddrie to a terminus at Constitution Street in Leith.It was single track throughout; the junction at Niddrie was facing for trains from Dalhousie.Carter gives the point of divergence as "Niddrie North Main Colliery", and he adds that the total length of the branches amounted to .