Type 31 frigate

The Type 31 frigate, also known as the Inspiration class, formerly known as the Type 31e frigate or General Purpose Frigate (GPF), is a class of five frigates being built for the United Kingdom's Royal Navy, with variants also being built for the Indonesian and Polish navies. The Type 31 is intended to enter service in the 2020s alongside the eight submarine-hunting Type 26 frigates, replacing five general-purpose Type 23 frigates. The Type 31 is part of the British government's "National Shipbuilding Strategy".

Under construction by Babcock International, it is based on the Odense Maritime Technology (OMT) Iver Huitfeldt-class frigate hull and is marketed under the name Arrowhead 140. The design was sold to Indonesia as the four ship Balaputradewa-class frigate, equipped with Turkish MiDLAS VLS, in September 2021, and to Poland for the three ship Wicher-class frigates in March 2022.