If one looks at Google streetview, just to the southwest of Lanydrock Road bridge at Plymouth (just south west of Laira depot), there is (beyond what looks like a carriage washer) what appears to be a station complete with platform, buildings and lighting standards. I assume that this is something to do with the servicing facilities at Laira, but is it what is looks like? Are there any better pictures of it?
https://maps.app.goo.gl/GHFoE3QnCS9AUjaE7
Stu