The London (Maiden Lane) to Peterborough was ready for a demonstration opening run on 5 August 1850, and it was opened to the public on 7 August 1850; eight passenger trains were run each way daily, with three on Sundays. On 8 August 1850 trains started running through from London to York. The Maiden Lane terminal was referred to by the company as "King's Cross". A through train to Edinburgh was run from 2 September 1850; the train ran via Peterborough, Boston, Lincoln, Retford, Doncaster, Knottingley, Milford Junction and York, thence by the York, Newcastle and Berwick Railway (not yet open on a direct route).