To complete this short series of posts, I have produced a survey of the standard gauge branch that replaced the ECMR. Its one and only major structure is the Calstock Viaduct which remains in use in 2019 to carry the truncated branch-line to Gunnislake.
http://rogerfarnworth.com/2019/04/02...lington-branch
This post also provides a little information about a possible reinstatement of the old line between Bere Alston and Tavistock.