Thanks Dave.
If you drive down Stubbins Lane with the big factory to your left, turn left onto Stubbins Street at the lights where the road goes under the railway bridge, then turn right after the row of houses on your right into Stubbins Vale Rd, about 100ft down on the right you'll see the footpath (it was also the entrances to the Stubbins halt platforms) that goes under the railway line. There a bit of open land just to the right of the underpass, if you walk diagonally across this land to the top right corner you'll get to the spot where I took the first image.
There's also another spot near here at Strongstry Bridge, if you follow Stubbins Vale Rd past the factories the road turns to the right and under a railway bridge. There's a footpath just after the the bridge on the left hand side, you'll get to a point where the path is overgrown and the fence is down on your left where the tracks are.