Adam:

Have a look at this useful link and in the meantime provide magnification.

Best

Syed

Yes I have that guide already.  I was hoping someone could identify it from the picture as I can't get better magnification with my camera.

Best

Adam

Adam:

Could you please provide magnification scale if not higher resolution.

Best

Syed

Oh sorry - I see what you mean. 

Yes the whole fossil is about 6cm long from the tip of the cephalon to the tip of the pygidium.

Thanks

I now have it on good authority that this is a Liobole sp.

Thanks for your help