HMS Foylebank was a converted 5,500 ton merchant ship active during the Second World War. She was launched as the MV Foylebank by Bank Line in 1930 and requisitioned by the Royal Navy in September 1939. She was converted into an anti-aircraft ship, equipped with 0.5 inch (12.7 mm) machine guns, two quad 2-pounder pom-poms and four twin high angle 4-inch gun turrets. The Foylebank saw action in Portland Harbour next to the Isle of Portland in Dorset, England. She arrived in Portland on 9 June 1940 for a work-up to anti-aircraft duties commanded by Captain Henry P. Wilson.