Thanks so far guys,
Curiouser and curious, I am not getting a fault code so perhaps it is operating but not efficiently? Or it could be something else entirely. I plan on making it a little project of mine to get the fuel economy fixed up to acceptable levels (I did up a list last night), it will be funded by petrol I don't have to buy in the future.
I know this is off topic somewhat, but what is the the doober to the left of this temp sensor? Also could an O2 sensor be to blame?
~Reece