This wont take long, just thought I would break the ice with this Euro thing, makes interesting viewing, here's a list of the all
The British Empire Members at some point or another over the history of time. -
Aden
Afghanistan
Andaman and Nicobar Islands
Anguilla
Antigua
Aruba
Ascension
Ashmore and Cartier Islands
Australia
Bahamas
Bahrain
Baker Island
Baluchistan
Banda Islands
Bantam
Barbados
Barbuda
Basutoland
Batavia
Bay Islands
Bechuanaland
Benkulen
Bengal
Berbice
Bermuda
Bhutan
Bombay
Bonaire
Bonin Islands
British Cameroons
British Columbia
British Guiana
British Honduras
British Indian Ocean Territory
British Kaffraria
British New Guinea (Papua Territory)
British Somaliland
British Togoland
British Virgin Islands
Brunei
Burma
Bushire
Canada
Lower Canada
Upper Canada
Canton and Enderbury Islands
Cape Breton Island
Cape Colony
Cayman Islands
Ceylon
Christmas Island
Christmas Island (Pacific)
Cocos Islands
Connecticut
Cook Islands
Coorg
Cuba
Curacao
Cyprus
Cyrenaica
Darien, Panama
Delaware
Demerara-Essequibo
Dominica
Dutch East Indies
Dutch India
Egypt
Eire/Ireland/Irish Free State
Elizabeth Island
Ellice Islands
Eritrea
Falkland Islands
Fernando Po
Fiji
Florida
French India
French Somaliland
Gambia
Georgia
Gibraltar
Gilbert Islands
Goa
Gold Coast
Goree
Grenada
Griqualand West
Guadeloupe
Hawaii
Heligoland
Hirado
Hong Kong
Howland Island
India
Ionian Islands
Iraq
Ireland
Italian Somaliland
Jamaica
Jarvis Island
Kamaran Island
Kenya
Kuwait
Labuan
Lagos
Leeward Islands
Lord Howe Island
Madeira
Madras
Maine
Malacca
Malaya
Maldive Islands
Malta
Martinique
Maryland
Massachusetts
Mauritius
Minorca
Moluccas
Montserrat
Mosquito Coast
Natal
Nauru
Nepal
Nevis
New Brunswick
New Caledonia, (Darien), Panama
Newfoundland
New Hampshire
New Hebrides
New Jersey
New York
New South Wales
New Zealand
Nigeria
Niue
Norfolk Island
North Borneo
North Carolina
North West Frontier Province
North West Territories
Northern Nigeria
Northern Rhodesia
Nova Scotia
Nyasaland
Ocean Island
Oman (Muscat and Oman)
Orange River Colony (Orange Free State)
Palestine
Palmyra Atoll
Pakistan
Penang
Pennsylvania
Philippines
Pitcairn Island
Popham Colony
Prince Edward Island
Prince Edward Islands
Providence Island
Pulo Condor Island
Punjab
Qatar
Quebec
Queensland
Roanoke
Redonda
Reunion
Rhode Island
Rodriguez
Rupert's Land and North West Territories
Saint Barthelemy
Saint Croix and Saint Thomas
St Christopher
Saint Domingue, Haiti
Saint Eustatius
St Helena
St Lucia
Saint Martin
Saint Pierre and Miquelon
St Vincent
Saba
Samoa
Sarawak
Senegal
Seychelles
Sierra Leone
Sikkim
Sind
Singapore
Somalia
Solomon Islands
South Africa
South Australia
South Carolina
South Georgia and the South Sandwich Islands
South West Africa
Southern Nigeria
Southern Rhodesia
Straits Settlements
Sudan
Suez Canal Zone
Surat
Surinam
Swaziland
Tanganyika
Tangier
Tasmania
Tobago
Tokelau
Tonga
Tranquebar (Danish India)
Transjordan
Transvaal
Trinidad and Tobago
Tripolitania
Tristan da Cunha
Trucial Oman
Turks and Caicos Islands
Uganda
Vancouver Island
Virginia
Victoria
Walvis Bay
Weihaiwei
Western Australia
Willoughby
Windward Islands
Zanzibar
Zululand
I think that pretty much covers it, or did I miss some.

Border Control, What Border Control,
