Hi All, the ECU was at fault. I imported a second hand ECU which presented a whole load of issues re mapping the original data off the old ECU, this was unsuccessful as the immobiliser function could not be bypassed by the high street mapper, I had to get a specialist to remap the immobiliser, its now fixed but has cost best part of £900.00 (inc 2nd hand ECU) still cheaper then a new ECU.
You live and learn.