What were British royal navy's auxiliary cruisers?

British Royal Navy auxiliary cruisers were merchant ships converted for military use, primarily during World War I and World War II. These vessels were equipped with guns and other naval weaponry to serve as armed merchant cruisers, patrolling trade routes and engaging enemy commerce raiders. Their versatility allowed them to perform various roles, including anti-submarine warfare and convoy escort, while also being capable of carrying cargo and personnel. The use of auxiliary cruisers helped the Royal Navy extend its operational capabilities without the need for building dedicated warships.