The section of the Cambrian Line between Shrewsbury and Aberystwyth may be called the Cambrian Main Line.

History

The line comprises:
* Shrewsbury and Welshpool Railway between Shrewsbury and Buttington
* Oswestry and Newtown Railway between Buttington Junction and Newtown
* Llanidloes and Newtown Railway between Newtown and Moat Lane Junction