RN aboard RFA
Lyme Bay Ships in RFA service carry the
ship prefix RFA, standing for Royal Fleet Auxiliary, and fly the
Blue Ensign defaced with an upright gold killick anchor. All Royal Fleet Auxiliaries are built and maintained to
Lloyd's Register and
Department for Transport standards. As of early-2026, there are 9 ships in service with the Royal Fleet Auxiliary with a total
displacement of approximately 244,000
tonnes. These figures exclude the merchant navy vessels under charter to the Ministry of Defence performing sealift and fuel provisioning roles.
Underway replenishment The most important role provided by the RFA is replenishment at sea (RAS), therefore the mainstay of the current RFA fleet are the replenishment ships. Two classes of vessel are in service as of 2024: and the . The Tide class are designated 'Fast Fleet Tankers' that were ordered in February 2012. The four tankers were ordered from
DSME,
South Korea with design support from Britain's
BMT Defence Services, the first of which entered service in 2017. From 2022, only the Tide class remained active with both of the former vessels placed in extended readiness (uncrewed reserve) and then, in 2024/25, retired from service completely. As of April 2024, RFA
Tiderace was also reported to be in extended readiness, primarily owing to serious personnel shortages in the RFA. However, as of late 2025 it was reported that she was being reactivated primarily as a result of sailors becoming available due to the retirement of
RFA Argus. RFA
Fort Victoria is a 'one-stop' replenishment ship, capable of providing under way refuelling and dry cargo (i.e. rearming,
victualling and spares). Until 2011, she had a sister ship in until she was decommissioned as a result of defence cuts. Two ships of the also provided dry stores replenishment but were placed into extended readiness in 2020. The two ships were later decommissioned, leaving
Fort Victoria the only fleet solid support ship in service. In 2023,
Fort Victoria was reported to be in "reduced readiness" and, in 2024, she was relegated to "extended readiness" (uncrewed reserve). A class of three new fleet solid support ships are expected to arrive starting in 2031 under the
Fleet Solid Support Ship Programme. The manufacturing contract for this acquisition, valued at £1.6 billion, was signed in January 2023. The Tide class and
Fort Victoria incorporate aviation facilities, providing aviation support and training facilities as well as
vertical replenishment (VERTREP) capabilities. They are capable of operating and supporting
AgustaWestland Merlin and
AgustaWestland Wildcat helicopters, both of which are significant weapons platforms. The presence of aviation facilities on RFA ships allows for them to be used as 'force multipliers' for the task groups they support in line with Royal Navy doctrine.
Replenishment ships File:RFA Tiderace arrives at Fleet Activities Yokosuka for a scheduled port visit in August 2017.jpg|
Tiderace (Tide class) File:RFA Fort Victoria A387 BB.jpg|
Fort Victoria (
Fort Victoria class)
Amphibious warfare From 2025 the RFA has been tasked with playing the lead role in providing amphibious shipping within the naval service, through its three
dock landing ships (LSD). Typically one Bay-class vessel has also been assigned as a permanent 'mothership' for Royal Navy
mine countermeasures vessels in the
Persian Gulf. However, crewing problems in the RFA have meant that the capacity to do this has eroded. Nevertheless, in early 2026 it was indicated that RFA
Lyme Bay would again undertake that role. The 2021 defence white paper proposed the acquisition of a new class of up to six
Multi-Role Support Ships (MRSS) to support
littoral strike operations. These vessels are to replace the Bay-class ships, and other vessels, starting in the 2030s. In the interim, the white paper had proposed to upgrade one of the Bay-class vessels with permanent
hangar facilities in order to carry out the littoral strike role. However, in July 2022 it was reported that the future
littoral strike role would in fact be assumed by after a refit to convert her to this role. She continued in that role until she was deemed unsafe to sail in 2025 and then earmarked for scrapping in early 2026.
Dock landing ships File:The British Royal Fleet Auxiliary landing dock ship RFA Cardigan Bay (L3009) maneuvers into position to receive a U.S. Navy MH-60S Knighthawk helicopter assigned to Helicopter Sea Combat Squadron (HSC) 26 in 130520-N-OA702-044.jpg|
Cardigan Bay (Bay class)
Ocean surveillance/survey The RFA has acquired a
Multi-Role Ocean Surveillance Ship to protect undersea
critical national infrastructure, such as gas pipelines and undersea cables. In February 2023, the vessel identified for this role - MV
Topaz Tangaroa - was acquired and in October 2023 entered service as RFA
Proteus. She was purchased for some £70 million and was converted to act as a mothership for autonomous systems and have military communications and light defensive armament added. It is reported that a second MROS ship is envisaged, which may be a new build vessel and, as of 2023, is in the concept stage. Service entry is envisaged likely in the early 2030s.
Multi-Role Ocean Surveillance (MROS) Ship File:RFA Proteus in Cammell Laird.webp|
Proteus at Cammell Laird
Sealift and fuel provisioning The s were acquired in 2002 under a £1.25bn
private finance initiative with
Foreland Shipping known as the Strategic Sealift Service. These ships are Merchant Navy vessels leased to the Ministry of Defence (MoD) as and when needed and as such are not part of the RFA. However, they are listed here due to their role in expeditionary military operations and in provisioning U.K. military bases and facilities. Originally six ships were part of the deal, allowing the MoD use of four of the ships with two being made available for commercial charter, these latter two were released from the contract in 2012. The MoD also contracts to secure fuel supplies for facilities overseas. For sometime this requirement was maintained through charter of the vessel , then with the vessel
Raleigh Fisher and most recently with the ship
Leander Fisher. As of 2025,
Leander Fisher is tasked with supplying fuel to the United Kingdom's various naval establishments at home and overseas, as well as providing aviation fuel to RAF stations at
Cyprus,
Ascension Island and the
Falkland Islands. The MoD has
chartered vessels to commercial companies during periods when not in use for defence purposes.
Ministry of Defence sealift/supply vessels • Not part of the RFA, under charter to the MoD File:Merchant Vessel Hartland Point Carrying Military Equipment During Cougar 12 MOD 45154449.jpg|
Hartland Point (Point class) ==Rank insignia==