I took a gamble with this one in the end after extensively checking the ECU wiring etc and found a second had unit on ebay. A local VW specialist reprogrammed it for me and it fired up! Happy bunny now.

This is what the injector pattern should look like.



Its a bit of an odd pattern. The amps and volts probes were picking up off of number one injector. It appears that the ECU switches the common positive feed to all injectors as its needed as well as switching the individual injectors on the negative side, so you never get a constant 12v on the common connection to the injectors. Very weird! This trace shows the negative switch to that injector.