HMS Seraph (Pennant number: P219) was an S-class submarine built for the Royal Navy during the Second World War. Completed in 1942, she carried out multiple intelligence and special operations activities during World War II, the most notable of which was Operation Mincemeat. She was afterwards assigned to the 8th Submarine Flotilla in the Mediterranean on 25 August; she found herself selected to carry out special operations duties. Of the missions she carried out, three stand out among the rest.