Thanks Spruce, that kind of what my local garage has been saying but cant understand why someone would cut it from the main wiring loom when you can simply disconnect the sensor by pulling it out of the plug it goes into. Also it was running perfectly fine before the injector problem but now runs very harsh after it has been replaced and programed to the car.
A trip to fords it is then
.... best start cleaning when its raining too now 
Thanks again...
If you have a look yourself you might be able to find that wire. It might be in a section of the harness near the sensor that looks like its been tampered with. Maybe they tucked it back into the wiring harness just to get it out of the way. It would be around a hot exhaust so hopefully they did the honourable thing.
What bugs me tbh is why they would remove the wire in the first place if they were going to program the sensor out of the ecu anyway.
The only way is is for Ford to flash the ecu with the correct program for the car and then do a diagnostics check to see what the problems are.
.