HMS Hyacinth was a Flower-class corvette of the Royal Navy. She served during the Second World War and achieved three victories over enemy submarines in a highly successful career. Only Sunflower managed to repeat such success among her sister ships. She went on to serve in the Royal Hellenic Navy as RHNS Apostolis, was returned to the Royal Navy in 1952 and scrapped in the same year.

HMS Salvia (K97) was a Flower-class corvette of the Royal Navy. She was ordered on the eve of the Second World War and entered service in September 1940. She rescued many survivors from the prison ship SS Shuntien when it was sunk on 23 December 1941. A few hours later, on Christmas Eve 1941, Salvia too was torpedoed. The corvette sank with all hands, and all of the survivors that she had rescued from Shuntien were also lost.