Ciaran Talbot, this looks like some major damage. From what I can see on those pictures, you would require a new board. You might try to remove some of the shellac like coating with very fine emery cloth on both surfaces. Once you got that you can try and epoxy the actuwl board and use a trace pen to connect the trace. Now if you are really good, and have the right tools you could solder a bridge across the broken trace. This is best done with a controllable soldering iron, a stereo microscope and lots of practice. Best to replace the board. Just my 2cents. good luck.