Cheers. Had a quick look though and the lambda sensor is definitely connected (green end rather than grey). I've tried seeing where it could possibly connect to by pulling it tight and moving it to possible locations. Doesn't seem to connect anywhere. Got a Hayne's manual on the way so it might help.
Here's a photo of the inside of it:
It's got two wires going into it. One is blue with a yellow stripe and the other appears to be black (is dark now so it might be dark blue)