Original:  The British Government revoked the Royal Niger Company's charter (granted in 1886) as a result of these events and ongoing complaints against the company from the Brass people of the Benin Rivers, the killings of Hausa princes during the Bida Battle ( 1897 ) and ongoing territorial rivalry with the French.
Revised:  The British Government revoked the Royal Niger Company's charter (granted in 1886) as a result of these events and ongoing complaints against the company from the Brass people of the Benin Rivers, the deaths of Hausa princes during the Bida Battle ( 1897 ) and ongoing territorial rivalry with the French.
Edit intent: clarity