Have sorted the British list from post 58 into taxonomic order and added 5 of my own from today (Barnacle Goose, Bewick's Swan, Shelduck, Merlin and Twite) so it now stands at 151:
Brent Goose
Canada Goose
Barnacle Goose
Greylag Goose
Pink-footed Goose
Mute Swan
Bewick’s Swan
Whooper Swan
Shelduck
Mandarin Duck
Shoveler
Gadwall
Wigeon
Mallard
Pintail
Teal
Pochard
Tufted Duck
Scaup
King Eider
Eider
Velvet Scoter
Common Scoter
Long-tailed Duck
Goldeneye
Goosander
Red-breasted Merganser
Red-legged Partridge
Pheasant
Red-throated Diver
Great Northern Diver
Fulmar
Little Grebe
Red-necked Grebe
Great Crested Grebe
Slavonian Grebe
Black-necked Grebe
Cattle Egret
Grey Heron
Great White Egret
Little Egret
Gannet
Shag
Cormorant
Sparrowhawk
Goshawk
Red Kite
White-tailed Eagle
Buzzard
Water Rail
Moorhen
Coot
Oystercatcher
Avocet
Lapwing
Golden Plover
Grey Plover
Ringed Plover
Whimbrel
Curlew
Bar-tailed Godwit
Black-tailed Godwit
Turnstone
Knot
Ruff
Sanderling
Dunlin
Woodcock
Snipe
Common Sandpiper
Redshank
Greenshank
Kittiwake
Black-headed Gull
Mediterranean Gull
Common Gull
Ring-billed Gull
Great Black-backed Gull
Glaucous Gull
Herring Gull
Yellow-legged Gull
Lesser Black-backed Gull
Common Guillemot
Rock Dove
Stock Dove
Woodpigeon
Collared Dove
Barn Owl
Tawny Owl
Little Owl
Long-eared Owl
Short-eared Owl
Kingfisher
Great Spotted Woodpecker
Green Woodpecker
Kestrel
Merlin
Peregrine
Jay
Magpie
Jackdaw
Rook
Carrion Crow
Coal Tit
Marsh Tit
Willow Tit
Blue Tit
Great Tit
Bearded Tit
Skylark
Cetti’s Warbler
Long-tailed Tit
Chiffchaff
Blackcap
Dartford Warbler
Firecrest
Goldcrest
Wren
Nuthatch
Treecreeper
Starling
Blackbird
Fieldfare
Redwing
Song Thrush
Mistle Thrush
Robin
Black Redstart
Stonechat
Dipper
House Sparrow
Tree Sparrow
Dunnock
Grey Wagtail
Pied Wagtail
Meadow Pipit
Water Pipit
Rock Pipit
Chaffinch
Brambling
Hawfinch
Bullfinch
Greenfinch
Twite
Linnet
Lesser Redpoll
Goldfinch
Siskin
Yellowhammer
Cirl Bunting
Reed Bunting
The following 'easier' species are missing from that list (although I haven't checked back through this thread to see if they have been posted and not added to the original list in post 58):
Tundra Bean Goose
White-fronted Goose
Egyptian Goose
Green-winged Teal
Surf Scoter
Smew
Capercaillie
Black Grouse
Ptarmigan
Red Grouse
Grey Partridge
Black-throated Diver
Glossy Ibis
Spoonbill
Bittern
Golden Eagle
Marsh Harrier
Hen Harrier
Rough-legged Buzzard
Crane
American Golden Plover
Purple Sandpiper
Little Stint
Jack Snipe
Green Sandpiper
Spotted Redshank
Iceland Gull
Caspian Gull
Black Guillemot
Lesser Spotted Woodpecker
Ring-necked Parakeet
Great Grey Shrike
Chough
Hooded Crow
Raven
Waxwing
Crested Tit
Penduline Tit
Woodlark
Shore Lark
Common Redpoll
Arctic Redpoll
Parrot Crossbill
Crossbill
Corn Bunting
Lapland Bunting
Snow Bunting
Brent Goose
Canada Goose
Barnacle Goose
Greylag Goose
Pink-footed Goose
Mute Swan
Bewick’s Swan
Whooper Swan
Shelduck
Mandarin Duck
Shoveler
Gadwall
Wigeon
Mallard
Pintail
Teal
Pochard
Tufted Duck
Scaup
King Eider
Eider
Velvet Scoter
Common Scoter
Long-tailed Duck
Goldeneye
Goosander
Red-breasted Merganser
Red-legged Partridge
Pheasant
Red-throated Diver
Great Northern Diver
Fulmar
Little Grebe
Red-necked Grebe
Great Crested Grebe
Slavonian Grebe
Black-necked Grebe
Cattle Egret
Grey Heron
Great White Egret
Little Egret
Gannet
Shag
Cormorant
Sparrowhawk
Goshawk
Red Kite
White-tailed Eagle
Buzzard
Water Rail
Moorhen
Coot
Oystercatcher
Avocet
Lapwing
Golden Plover
Grey Plover
Ringed Plover
Whimbrel
Curlew
Bar-tailed Godwit
Black-tailed Godwit
Turnstone
Knot
Ruff
Sanderling
Dunlin
Woodcock
Snipe
Common Sandpiper
Redshank
Greenshank
Kittiwake
Black-headed Gull
Mediterranean Gull
Common Gull
Ring-billed Gull
Great Black-backed Gull
Glaucous Gull
Herring Gull
Yellow-legged Gull
Lesser Black-backed Gull
Common Guillemot
Rock Dove
Stock Dove
Woodpigeon
Collared Dove
Barn Owl
Tawny Owl
Little Owl
Long-eared Owl
Short-eared Owl
Kingfisher
Great Spotted Woodpecker
Green Woodpecker
Kestrel
Merlin
Peregrine
Jay
Magpie
Jackdaw
Rook
Carrion Crow
Coal Tit
Marsh Tit
Willow Tit
Blue Tit
Great Tit
Bearded Tit
Skylark
Cetti’s Warbler
Long-tailed Tit
Chiffchaff
Blackcap
Dartford Warbler
Firecrest
Goldcrest
Wren
Nuthatch
Treecreeper
Starling
Blackbird
Fieldfare
Redwing
Song Thrush
Mistle Thrush
Robin
Black Redstart
Stonechat
Dipper
House Sparrow
Tree Sparrow
Dunnock
Grey Wagtail
Pied Wagtail
Meadow Pipit
Water Pipit
Rock Pipit
Chaffinch
Brambling
Hawfinch
Bullfinch
Greenfinch
Twite
Linnet
Lesser Redpoll
Goldfinch
Siskin
Yellowhammer
Cirl Bunting
Reed Bunting
The following 'easier' species are missing from that list (although I haven't checked back through this thread to see if they have been posted and not added to the original list in post 58):
Tundra Bean Goose
White-fronted Goose
Egyptian Goose
Green-winged Teal
Surf Scoter
Smew
Capercaillie
Black Grouse
Ptarmigan
Red Grouse
Grey Partridge
Black-throated Diver
Glossy Ibis
Spoonbill
Bittern
Golden Eagle
Marsh Harrier
Hen Harrier
Rough-legged Buzzard
Crane
American Golden Plover
Purple Sandpiper
Little Stint
Jack Snipe
Green Sandpiper
Spotted Redshank
Iceland Gull
Caspian Gull
Black Guillemot
Lesser Spotted Woodpecker
Ring-necked Parakeet
Great Grey Shrike
Chough
Hooded Crow
Raven
Waxwing
Crested Tit
Penduline Tit
Woodlark
Shore Lark
Common Redpoll
Arctic Redpoll
Parrot Crossbill
Crossbill
Corn Bunting
Lapland Bunting
Snow Bunting