(was Canada still a british Commonwealth in 1903?)

still is in 2002 mate, and will be in 2003
http://www.rcscanada.org/commonwealth/history.html
as is
Aden, Aitutaki, Alderney, Anguilla, Antigua, Ascension, Australia, Australian Antarctic, Bahamas, Bahrain, Barbados, Barbuda, Basutoland, Botswana, British Antarctic, Guiana, Honduras, British Indian Ocean Territories, Brunei, Caicos Is, Cayman Is, Christmas Is, Cook, Dominica, Falkland Is, Fiji, Gambia, Ghana, Ginralta, Gilbert Is, Britain, Britain Regionals, Grenada, Grenada Grenadines, Guernsey, Guyana, India, Ireland, Isle of Man, Jamaica, Jersey, Kenya, Kiribati, Kuwait, Leeward Is, Lesotho, Malawi, Malaya, Malaysia, Maldives, Mali, Malta, Montserrat, Nauru, Nevis, New Guinea, New Zealand, Nigeria, Niue, Norfolk Is, North Borneo, Oman, Papa New Guinea, Penrhyn, Pitcairn, the Ross Dependencies, St Helena, St Kitts, St Lucia, St Vincent, Vincent Grenadines, Samoa, Sarawak, Seychelles, Sierra Leone, Singapore, South Africa (though they were excluded for some time during apartheid), Solomon Is, Southern Nigeria, South Georgia, Straits Sett, Swaziland, Tanzania, Tokelu, Tonga, Trinidad and Tobago, Tritan Da Cunha, Turks and Caicos Is, Tuvalu ( which is almost entirely destroyed now anyway), Uganda, Vaitupu, Vanuatu, Venda, Virgin Is, Zaire, Zambia, Zanzibar, Zimbabwe

I may have missed a few off, and apologies in advance for spelling mistakes.