Stockton and Hartlepool Railway
This line ran from Billingham to Hartlepool as an extension to the Clarence Railway and opened for goods traffic in 1840 and passengers a year later.
In 1844 it acquired a 21-year lease of the Clarence Railway
It floated the Hartlepool West Harbour and Dock Company and then amalgamated it in 1852 and became the West Hartlepool Harbour and Railway.