HMS Trump was a British submarine of the third group of the T class. She was built by Vickers-Armstrongs, Barrow, and launched on 25 March 1944. So far she has been the only ship of the Royal Navy (RN) to bear the name Trump. She spent the majority of her life attached to the 4th Submarine Squadron based in Australia. She was kept in service following the war and was refitted for greater underwater performance, and was the final RN submarine to be posted in Australia, departing in January 1969. She was sold off and broken up for scrap in August 1971.

HMS Tabard was a British submarine of the third group of the T class. She was built by Scotts, Greenock, and launched on 21 November 1945. So far she has been the only boat of the Royal Navy to bear the name Tabard, after the item of clothing. Having been launched after the war, she was selected, along with a number of boats of her class, to try out new streamlining techniques based on the German Type XXIII submarine. In May 1963, she was involved in a collision with HMAS Queenborough, and on 10 February 1964 she underwent exercises with HMAS Melbourne and HMAS Voyager in the hours before their collision. When she returned to the UK, she became the static training submarine at the shore establishment HMS Dolphin, until 1974 when she was sold and broken up.