Cheers Guys for the feedback.
Had another play. Just ran the car up to temperature, oil temp displayed on the dash, switched it off, removed the wire attached to the lower sensor, started car again, still Oil temperature readings on the dash. Not sure what this sensor is for at the minute. A yellow wire was on this one.
I've since managed to remove this from the Tee piece ( Pics below )
[ATTACH=CONFIG]81961[/ATTACH][ATTACH=CONFIG]81962[/ATTACH]
Given i was still seeing oil temp readings it leads me to think the top sensor, red wire is temp reading on oil.