Update
I re attached the Rev Counter and Water Temp Gauges.
From a cold start the Rev counter does not register any Revs for a short while (5-10 seconds) but then works fine for the rest of the trips. This is new, it has always been instant and still is if started soon after switching off. Torque Pro shows the Revs during this period.
The water temp gauge appears to work fine but the scale starts at 60 degrees so wouldn't register straight away. Again Torque Pro registers the temp from start up.
There has been no observed drop in any of the Gauges, I increased the frequency of the Torque Pro Log entries to half a second for the recent runs and there was 1x instance of Torque Pro reconnecting to the ECU, the drop was only 1 record so half a second, which doesn't feel significant but someone on here may put me right.
I'm not expecting m/any comments at this stage, it just helps to write down where I'm at and may help others in the future.
I don't plan to add the Fuel Gauge for a while, I want to be as certain as I can be that the problem has gone before adding it, and due to Grandparent duties during the 6 weeks holidays it may be a while before we get any significant runs out.
Regards