An update from today in the garage.
I removed the fuel injectors and tested them with a jury-rig. One of them was passing fluid before it was energised so could have been causing the excess fuel. Gave them all a good clean through and they all now function correctly .
Noticed the HT lead from the coil to the distributor was a bit fretted so will get a new one and stick the injectors back in when I get new seals.
Will also look at how to reset the ECU back to factory.