Paul and Jonathan, Thank you for your inputs, I now believe I have done enough to get me going. There was continuity between the ECU Pin 2 and the ignition switch, and when applied there was 12 volts. There was no continuity between the ECU Pin 2 and Coil, nor between the Coil and ignition switch. I could not find a relay and I didn't want to remove the black tape from the loom to find a broken wire (I will save this for the winter). I have added a wire now to the Coil, connected to a spare contact on the ignition switch and hey ho everything works as it did before. Thanks again Paul