Did not think I would ever manage to write this post because it was looking grim, did not seem to be any answers. It was something said to me by the guys that repaired the ECU about the original damage was caused by something on the car. So read the live data with the ignition on, seemed all wrong so spoke again to ECU repairers who agreed to look again at the unit, turned out to be damaged but not as badly as before, so this time it was repairable, so whilst the ECU was away we checked the wiring out for all the sensors and guess what we found by the exhaust.




Surprised and astonished, rang the ECU repairers to tell them, they already had the answer and just had not rang to tell me, the problem was in the ECU on the O2 sensor circuit but the damage and signal loss on the O2 sensor wiring fools the ECUs fault memory into believing that the throttle system was at fault, basically corrupting the data. So don't believe all you read, the old adage about computers getting crap in will just result in crap out seems very apt here.
Many thanks to all who responded.
P.S. have funnily enough also see an earth return fault causing major running problems with a TVR also, cured by earthing the earth return from the O2 sensor heater to a earth bolt on the engine, cutting the wires on both sensors to stop the signal returning to the ECU.