Moving on...
I had a look at the ECU cupboard. All looks as it should, nothing is out of place. It's dry etc.
I removed the pump housing this afternoon complete with hydraulic lines and clutch actuator.
On the bench, I stripped the hydraulic lines off, blew through them, pulled off the reservoir, checked that the valves weren't stuck, removed and cleaned them and blew through the valve block with compressed air. I removed the pressure sensor, cleaned and blew through from there etc and checked that the clutch solenoid activated when a feed was put to it.
I did a lot of cleaning and checking but couldn't find anything wrong at all. The clutch actuator moves freely and sprays oil out.
I re-assembled it, refitted it to the car, filled it up with new oil (the old oil was fairly murky) and tried again with basic settings.
The clutch actuator still doesn't do anything and it still fails to get through basic settings, failing as before at 12.
After that, I chose to put a feed to the clutch actuator solenoid while the system was pressurised and the clutch actuator pulled in the clutch easily and stayed put. So that works. I had managed to move the clutch lever when removing and refitting the clutch actuator.
I went through trying basic settings again... no change.
Then I looked at the G239 and G240 sensors on the solenoid block. Apparently they suffer due to heat from the exhaust so I swapped over the upper sensor (G239 I think) with the one from the Lupo 3L.
The A2 still does ****** all and the Lupo 3L still drives fine.
Ho-hum...
MG