It's Fixed!
After 6 weeks the car is back on the road.
The problem was the original car alarm that was fitted to the car but unused for years. The BOSCH specialist thinks the alarm was playing up and preventing the car starting.
After removing the alarm and all fittings, replacing the coil and a recon ECU the car now starts.
However it still runs lumpy when cold ( possibly a new warm up reg) but when warm idles fine.
Only one problem, the car now feels noticeably slower than before all these problems started. It has lost alot of power over the full rev range. The mechanic has tuned it and the guy is a BOSCH specialist so i assume it's set up correctly.
Has anyone had any problems like this after replacing the ECU?
Cheers lads/ girls.