"Queenborough" departed Trincomalee on 15 October as part of Task Force 63, a British Eastern Fleet operation to focus Japanese attention on the west coast of Malaya as a diversion for American amphibious landings in the Philippines. The diversionary attacks, known as Operation Millet, included a series of bombardments and air raids against Japanese installations and ships in Malacca and Car Nicobar, and were intended to appear as if the Allies were preparing an invasion of Malaya. "Queenborough" was attached to Group 1, consisting of the battleship and her escorts, and bombarded Car Nicobar on 17 and 18 October. Despite heavy damage to the target areas, Operation Millet failed to attract a significant reaction from the Japanese, as available resources were already en route to defend Leyte from invasion.