Decided to try once more at dawn at Christophe, leaving Michelle in bed. En-route I flushed a Nightjar, and at dawn had a Marsh Tit and a Jay, as well as close views of a family of Chamois. However, the only additions in a two hour search (hampered by patchy hill fog) were of a Chiffchaff, a Blue Tit, and a Garden Warbler.
At Grenoble airport I noticed a male Hen Harrier hunting in the short grass. Finally a flock of about fifty Jackdaws flushed by the plane taking off proved to be the last new species for the trip.
Back home in a sunny UK(!) a Holy Blue was in the garden as well as several Painted Ladies.