Really interesting stuff. I lived in Plymouth for 3 years in the 80's and I'm kicking myself I missed this! Too interested in Hoovers and HSD at the time! Although I did photograph some freight activity at Friary a couple of times. I seem to remember an article in a model rail mag years back about modelling the Cattewater branch. I have a feeling it may have been MTI but can't be sure. The shed with the intersting roof profile jogs a memory.