Burnt ignition wire help 110 TD5 wont start

Was out in my 2001 110 CSW TD5 this afternoon when one of my speakers started to crackle and then could smell the good old burning wire smell. I pulled the car over and switched the ignition off and checked to see if i could smell where the smell was coming from. Had no joy so decided to drive back home but the igntion didnt fire. All lights come on, get a click but nothing happens at all. Seems as though the burning smell was from a wire that goes to the starter motor.

Anybody had a similar thing or give some light as to where it could be. Ive checked fuses and wires from ignition to relay and all seem to be ok so I am a bit stumped.