Now I know what people mean about Renault electrics.
I repaired the cluster in this one. Drove it for a few days and all was ok. Gave it back to my sister and two days later it failed to start due to a flat battery. Took it back in and monitored the drain again (amp clamp on pico). No drain present. On the third night it consumed the battery, not even dash lights in the morning. Because the cluster had been faulty and they are cheap we decided to try a new one. Again no apparent problem until this mornings flat battery.
Now I am not a fan of bolt on diagnostics but at this stage I would try it. What causes of battery drain has anyone seen on these?