Digging Bar / Giant Chisel (Harrogate HG1)

I think this tool is called a Digging Bar. It's a kind of giant nail or chisel. This one is about 3ft or 1 metre long. It's used for thumping hard concrete or even hard earth, to make a hole for a fencing post or to break up hard ground or even concrete.
It is barely detectable in the photo, but it is very, very slightly bent. I don't think it is bent enough for this to affect its effectiveness.