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.

[4] The torpedo armament was the same as the earlier group two, although by the time group three was coming into service it was realised that external torpedo tubes had major problems and affected the streamlining of the boats; the external tubes were abandoned in the following Amphion class.

Due to expected use in tropical climates, boats of group three were equipped with freon blowers in order to deal with the increased temperatures.

[6] Although it was escorted by a Japanese patrol boat, they successfully sank Tencho Maru, an army cargo ship, with the sinking credited to Tiptoe.

[7] This "Slippery T" or "Super T" conversion involved the removal of the deck gun and the replacement of the conning tower with a streamlined "fin".

[7] The diesel engines were modified and supercharged with output increased by 300 brake horsepower (220 kW).

Trump was one of two submarines, the other being HMS Tabard, which had the bridge incorporated into the added fin section;[7] and was the last to undergo this conversion.