Perhaps a buffer stop like the one at Banbury St shunt neck. The track is long since gone but the block still remains, (co-ordinates 52o 28' 53" N ; 1o 52' 42" W) probably because it was encased in about 25m3 of concrete, It is to the right of the picture here http://www.warwickshirerailways.com/lms/lnwrbhm_sa2320b.htm.
My Grandfather told me it was provided when the driver of a light engine misread the 3 arm tall siding signal, thinking he was going main line when the road was set for the neck. He nearly ended up in the bar of the Viaduct pub which used to stand just down below on Lawlet St.
Going slightly O/T, that's a rather nice chimney at Wright's Ropes. Unusual and not too high, about 2 signals higher than the embankment. Could find a place in my own project for that.
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