The red-and-white chequered flag reflects railway land maps, where alternate blocks went to the railway and government. A smaller version served as a jack. Its introduction is variously dated to 1882, 1883 or 1891, with use continuing to 1968. The National Maritime Museum specimen, about 1955, measures 2932 × 3948 mm. Accounts of the associated plain-yellow and black-topped yellow or buff funnels differ: the text gives coastal black-topped yellow for 1883–1968 and deep-sea black-topped buff-yellow for 1906–21, while other references extend plain yellow to 1946 or date its transpacific use to 1890 or 1903–06 and again after 1921. These descriptions are retained collectively rather than forced into a single chronology. Mersey Towing’s use is also recorded, but owner-versus-manager roles are unclear.
Keep the explicit scope label independent; no alias or company identity is inferred.