we havent had bluetits nesting for the last 2 yrs (due to next doors cats?)
But all the years we have had babies, they have all suddenly gone early in the mornings, and we have been lucky to see them take flight most of the time.
They kept on popping their little heads out , untill suddenly you see them all over the garden, being encouraged out of the box. Such a lovely sight to see.
oleanda, I reckon your babies have left the nest by now if all has gone quiet