...there appears to be some kind of marking along one edge almost like symetrical diagonal scratches meeting in the middle as a chevron
Simon's pic shows this off better than mine:
🔗Cwmorthin-Floor-4-05-01-2008-Image-001[linkphoto]Cwmorthin-Floor-4-05-01-2008-Image-001[/linkphoto][/link]
The grooves are angled inwards from the bottom towards the centre and the pattern is repeated on both sides. The left hand front edge (of the back one in the picture, if you will) is worn away whereas the right hand edge is not.
My guess would be that this wear is the result of the object being driven into a gap, thus creating the wear. The direction of the grooves would help to push the object in, but once it got beyond halfway, the direction of the grooves switches, which might help pop the object out of whatever it had been pushed into.
My guess would be that this is some sort of wedge to go between a sleeper and tramway rail?
Hello again darkness, my old friend...