Extremely Difficult Test
A source to help: https://www.britishempire.co.uk/timeline/colonies.htm
Updates: I added regions and removed redundant answers, and a timeline will be added later because I'm lazy.
Could do with clearer guidance - source, time period, and also that the same territories feature several times under different administrative units/ names. Please do check them again as there are some spelling errors - Tanganyika, North Borneo etc.
Interesting quiz. Could there be a little more leniency with some of the answers? For example, could you consider accepting Cameroon, New Guinea, Somaliland, Cape Province or just Cape Town, Aden, Akrotiri, British Columbia, Togo, Prince Edward Island, Shetland(s) and South Georgia? Also Tanganyika and Tristan da Cunha have typing errors.