Woohooo!!! Horn is working again.
Had another closer look today. I took the brown cable out completely from within the steering wheel and noticed that the ends were in fact dirty. I used some sand paper and sanded the ends clean again and it came back to life.
I feel much better now that I ve got the horn working again so many bad drivers out there its essential :)
Need to figure out how to put the fuse cover back neatly!! Its really fidgety...I 'll leave that for another day !
Thanks all for your help and suggestions