Bird Atlas breeding evidence gaps

I have been asked by several roving recorders where we should focus our efforts during the breeding season, so I have reviewed which birds have been recorded as confirmed breeding. Here's a summary for a number of commoner species, I have excluded those that have been confirmed in all hectads (10km squares):

Mute Swan SE53, SE55, SE56, SE64, SE66, SE67, SE73, SE75

Greylag SE53, SE56, SE64, SE67, SE73

Canada Goose SE53, SE55, SE56, SE57, SE64, SE67, SE73, SE75, SE76

Mallard SE53, SE57, SE66

Other ducks Most species in most hectads (only the occasional one confirmed)

Red-legged Partridge All hectads

Grey Partridge SE53 to SE55, SE57, SE64, SE66, SE67, SE74 to SE77

Pheasant SE53 to SE55, SE57, SE75, SE77

Little Grebe SE54 to SE56, SE65, SE66, SE73, SE75 to SE77

Great-crested Grebe SE53, SE56, SE63, SE64, SE66, SE67, SE74 to SE76

Sparrowhawk SE53, SE57, SE63 to SE67, SE75 to SE77

Buzzard Most hectads

Kestrel Most hectads

Moorhen SE75

Coot SE56, SE64, SE67, SE75

Lapwing SE53, SE55, SE57, SE73, SE75

Other waders Most hectads

Feral pigeon SE53 to SE57, SE66, SE67, SE73 to SE77

Stock Dove SE53, SE56, SE57, SE64, SE66, SE67, SE73 to SE77

Woodpigeon SE76

Collared Dove SE53, SE54, SE56, SE64, SE66, SE67, SE73 to SE77

Turtle Dove Everywhere

Cuckoo Most hectads

Barn Owl SE53, Se54, SE56, SE57, SE75

Little Owl Most hectads

Tawny Owl SE53 to SE55, SE64, SE66, SE67, SE73, SE75 to SE77

Swift SE53, SE64, SE66, SE67, SE73

Kingfisher Everywhere

Green Woodpecker Most hectads

Great Spotted Woodpecker SE57, SE64, SE67, Se73, SE75, SE77

Skylark SE53 to SE55, SE57, SE66, SE67, SE73 to SE75, SE77

Sand Martin SE53, SE56, SE57, SE63, Se64, SE66, SE67, SE75, SE76

Tree Pipit Everywhere

Meadow Pipit Most hectads

Yellow Wagtail SE54 to SE57, SE64, SE67, SE73, SE75 to SE77

Grey Wagtail SE53, SE54, SE56, SE57, SE66, SE73, SE77

Pied Wagtail SE57

Wren SE53, SE73, SE75, SE77

Dunnock SE75

Mistle Thrush S53, SE56, SE57, SE64, SE66, SE73, SE75, SE77

Sedge Warbler Most hectads

Lesser Whitethroat Everywhere

Whitethroat SE54, SE57, SE73, SE75, SE77

Garden Warbler Most hectads

Blackcap SE54 to SE57, SE63, SE65, SE66, SE73, SE76

Chiffchaff SE56, SE57, SE63, SE64, SE66, SE67, SE73, SE75, SE77

Willow Warbler SE56, SE57, SE65, SE66, SE73, SE76, SE77

Goldcrest Most hectads

Spotted Flycatcher SE54, SE55, SE57, SE65, SE73, SE75, SE77

Long-tailed Tit SE54, SE56, SE57

Marsh & Willow Tit Most hectads

Coal Tit SE56, SE64, SE75

Treecreeper SE53 to SE57, SE64, SE67, SE73, SE75, SE77

Jay Most hectads

Magpie SE53, SE54, SE57, SE66, SE73, SE75 to SE77

Jackdaw SE53, SE66, SE73

Chaffinch SE73, SE77

Greenfinch SE53, SE56, SE67, SE73, SE76

Goldfinch SE54, SE56, SE73, SE76

Linnet SE54, SE56, SE57, SE65, SE66, SE73, SE74, SE76, SE77

Lesser Redpoll Everywhere

Bullfinch Most hectads

Yellowhammer SE53, SE54, SE56, SE57, SE63, SE66, SE67, SE73, SE76, SE77

Reed Bunting SE53 to SE57, SE65, SE67, SE73, SE75

Corn Bunting Most hectads

Please look for evidence to confirm breeding for these species in the hectads as shown in the list. Evidence is also needed for scarce breeders, which I haven't put in the list.