Food deliveries are still coming into the box by both parents, but they are becoming less frequent.
More wing testing was observed today and the female Great Tit came back to roost with the young Great Tits tonight. Based on the age and size of the young Great Tits, I think it will only be a few nights before the female does not roost with them.

Will I be right and when will they fledge?
More in my next diary update