996 arrived back this weekend
The fault wasn't the wiring loom, they found it to be the Regulator/Recitifier, but only when the bike was cold and they put a load test on it and found the fault.
Really happy with the service as the final bill came to £506. Not bad considering they have had the bike for 7 weeks or so. Will be out running the parts in tomorrow. While out at the NEC I put an order in for the Techtronics Digital dash should be here in December, so will have fun fitting this. Anyway all is now well and can't wait for next year and get on the track days.