Northern Rhodesia became a directly - run British protectorate in April 1924 .
The Company 's charter was duly revoked by Whitehall in 1923 , and Southern Rhodesia became a self - governing colony of Britain in October that year .
Northern Rhodesia became a directly - run Britain protectorate in April 1924 .
The Company 's charter was duly revoked by Whitehall in 1923 , and Southern Rhodesia became a self - governing colony of Britain in October that year .