David Tozer and Nick Dyke
I would date this picture around 1892. We are looking at the southern end of Carne Point sidings and wharves. The line from Lostwithiel (built in 1869 to broad gauge) has been purchased by the CMR and was regauged and reopened in 1895. The state of the trackwork here suggests that this has not yet come to pass. The Lower wharves at Carne Point (the ones we are looking at here) were built by the CMR with their line from St Blazey and opened in 1874. In the 1890s the passenger service to Lostwithiel began and the GWR (the new owners) extended the wharf installations upriver.
Many thanks Roy.