I managed to trace the ABS fault down to a crushed cable after testing it with a multi meter so then went to find how much this will cost to replace and found Triumph asking £125.00 for the part + fitting it. So decided to see if I can find a second hand sensor but no luck there, I did find that both front & rear sensor are the same item then I found that these sensor are the same as the Triumph Tiger 1050 Sport front only by cross ref the part No. so tried again for a second hand one for this model and these are easy to find luckily. I got one for £17.00 on ebay and job done.