Blue Tit: occupied 40 boxes with 1 to 10 eggs all covered and cold (still laying), none sitting yet.
Great Tit: occupied 8 boxes, with 1 to 5 eggs, surprisingly few compared to Blue Tit but hopefully will increase at the next check.
Nuthatch: 5 boxes includes nest building as the make up of the nest of dried leaves (mainly oak) is obvious.
Comment: Occupation is variable so far but may change as species currently unknown (nest building) are confirmed. There appears to be little coordination of effort this year with nesting stages all over the place, even within species, from nests just starting to clutches almost complete.
(JL with KEL)