Many thanks for the reply
I have a copy of Digimoto 4.03 and so can do live data while driving. Looks like my Lamda sensor voltage values are OK - yes ?
You can select any value and watch it on a chart which updates a few times every second. It was from this that I saw the Intake Temp dropping down to zero now and again. I'll run a chart on the Lamda tomorrow.
Here's a screenshot of my general values