BELFAST, MERSEY & MANCHESTER STEAMSHIP CO. LTD.

The earlier flag had a larger white diamond with blue “B+M” above “S.S.Co.”. Sources differ over red, blue or black lettering in the later flag; the FOTW rendering shows red.

The funnel is not specified for B466. Mitchell suggests a darkish yellow or buff. Rosanoski questions the colour interpretation attributed to Sampson 1957, since the 1959 monochrome hatching indicates black lettering.

The National Maritime Museum flag is dated about 1955 and measures 1219.2 × 1828.8 mm.