 The GP&GR opened in March 1841, having been delayed due to the difficulties in the construction of the tunnel at Bishopton.There was never a Glasgow and Paisley Joint Railway "Company"; the Joint Line was managed separately from the other parts of the two owning companies, and managed by a Joint Committee.Some authors have referred to "the Joint Railway" and this has sometimes been taken to imply company status, but that is erroneous.