Future Cruise/Anti-Ship Weapon

The FC/ASW ("Future Cruise/Anti-Ship Weapon"), FMAN/FMC ("Futur missile anti-navire/Futur missile de croisière" in French), FOSW ("Future Offensive Surface Weapon") or SPEAR 5 is a next generation missile programme launched by France and the United Kingdom in 2017 to succeed their jointly-developed Storm Shadow/SCALP as well as their respective Exocet and Harpoon anti-ship missiles. Equally funded by both countries, the project is led by European missile manufacturer MBDA and is a product of the close defence relationship set out between both nations by the Lancaster House treaties. In June 2023, it was announced Italy would join the programme and began allocating funding in November.

In 2017, an agreement for the launch of a concept phase of the programme was signed between the two countries and, in March 2019, MBDA announced the key review of the programme was successfully completed in cooperation with the French Defence Procurement Agency (DGA) and the British Defence Equipment and Support (DE&S).

On 18 February 2022, an agreement and associated contracts signed by the head of the DGA, his British counterpart and the CEO of MBDA confirmed the launch of the preparation works for the FC/ASW.

As of 2022 the programme was examining two complimentary missile concepts: a low observable subsonic cruise missile and a supersonic highly manoeuvrable missile; with the apparent discontinuation of a hypersonic solution similar to the CVS401 Perseus which was an early hypersonic missile concept from MBDA developed with input from both France and the UK.

The latest timeline for the programme is that the assessment phase will be completed in 2024 and would move to the manufacturing phase from 2025 till 2035. There was also confirmation of two different, role-specific variants with the announcement that a deep-strike, land-attack variant would be delivered from 2028 and an anti-ship variant from 2034.

Early concept study (CVS401 Perseus)
Unveiled in 2011 at the Salon du Bourget in Paris, Perseus or CVS401 Perseus (named after the Greek hero Perseus) was a concept study undertaken by MBDA for a stealth hypersonic cruise missile designed in consultation with the Royal and French Navies and was produced by ten engineers working on the design for six months.

The Perseus was to be approximately 5 m in length, had a weight of around 800 kg and be powered by a ramjet motor. The payload consisted of one 200 kg main and two 50 kg subsidiary warheads which could either directly contribute to the overall impact or be ejected from lateral bays before the missile reaches its target, in effect acting as submunitions. This unique feature would allow a single Perseus to either strike several targets in the same general area or to strike a single large target (such as an aircraft carrier) in several different areas simultaneously, with the aim of maximising damage. "In this case, a linear attack pattern could be selected, munitions striking the forward, centre and aft sections simultaneously. If a unitary blast is required, then the effectors remain on board the parent missile to add their blast effect to the central warhead."

Two types of attack profiles were envisaged: a high-altitude approach, for engaging land-based targets; and a sea-skimming low-altitude approach terminating in a 'pop-up' engagement when dealing with surface threats like enemy warships. The missiles "skimming the sea at wave top" followed by a pop-up manoeuvre would only allow an estimated 3 second response time for enemy warships.

The conceptualised sensor suite consisted of a multi-mode active e-scan radar with synthetic aperture radar and doppler beam sharpening, a laser radar (lidar) for terminal phase imaging and target recognition, and finally a "semi-active laser guidance capability, which MBDA believes will remain important for time-sensitive targeting for many years to come. Additionally, satellite datalink is to be incorporated for in-flight re-targeting using thin-profile, low-observable active antenna arrays.

MBDA animations showed Perseus to be vertically launched from surface warships as well as from the torpedo tubes of submerged attack submarines.

Programme initialisation
At the 2016 UK–France Security Summit, the two parties pledged to work on a "joint concept phase for the FC/ASW programme" to cooperate and identify solutions for replacement of both nations' jointly-developed Scalp/Storm Shadow cruise missiles, as well as their respective heavyweight anti-ship missiles; Harpoon for the UK and Exocet for France; leveraging the agreements set out in the 2010 Lancaster House Treaties At the 2018 United Kingdom-France Summit, the FC/ASW programme was further affirmed.

On 11 July 2018, a joint-inquiry between the French National Défense and Armed Forces Commission and the British House of Commons Defence Select Committee was sat to discuss the FC/ASW program one year into its concept phase. In response to whether part of the system would take on similar roles to that of the Royal Navy's submarine-launched Tomahawk land-attack cruise missile, Lt General Sir Mark Poffley said that "Certainly we would anticipate the sorts of roles that Tomahawk is providing at the moment being catered for inside the requirement here". Additionally, it was confirmed that program would at the very least produce two variants, one air-launched and another surface-launched and that options were being explored as to whether a single missile type or a family of missiles would be required to fulfil both parties' anti-ship and deep-strike requirements. Sir Poffley also stated that a submarine-launched capability was not directly being explored at this time but that "there will undoubtedly be potentially some read-across of some of the work done in this programme to other missile systems". Additionally, Sir Simon Bollom of DE&S, clarified that the UK desired to integrate the resulting air-launched product on to the F-35B in the long-term.

In July 2021, then UK Secretary of State for Defence Jeremy Quin, responded to a question on the in-service date for FC/ASW, stating: "The planning assumption for service entry for Future Cruise/Anti-Ship Weapon on the Type 26 Frigate and Typhoon aircraft is 2028 and 2030 respectively".

I-SSGW
As a result of FC/ASW being unable to deliver a weapon before 2020, the then retirement date for the UK's Harpoon stockpile, In 2019 the UK began the £200 million Interim Surface to Surface Guided Weapon (I-SSGW) programme to procure a small stockpile of replacement missiles that would provide both anti-ship and land-attack capability (the latter of which was not a capability present in the Harpoon) in the interim until FC/ASW yielded a more capable replacement around 2030. To facilitate the selection and procurement of I-SSGW, Harpoons out-of-service-date would be pushed back to 2023 to provide more time to allow for the interim to be selected and enter service.

In November 2021, It was announced that the I-SSGW programme had been cancelled. First Sea Lord Admiral Tony Radakin explained to the House of Commons Defence Select Committee that the I-SSGW was seen as a "sticking-plaster approach" delivering only a "modest" capability for a short-period of time that would quickly be replaced by the more capable FC/ASW solution and that instead it would be more beneficial to just invest entirely in the FC/ASW programme. This decision would have left the UK without any heavyweight surface-launched anti-shipping capability for most of the 2020s after Harpoon retires and before FC/ASW enters service and was therefore controversial.

On 5 July 2022, during another Commons Defence Select Committee session, it was announced that the I-SSGW programme had restarted, possibly in response to the Russian invasion of Ukraine in February 2022. On 23 November 2022, in was announced that the Norwegian Naval Strike Missile (NSM) had been selected for the I-SSGW requirement with eleven sets purchased to equip the Type 23 frigates and Type 45 destroyers with the possibility of migrating some of the sets to the Type 26 or particularly the Type 31 frigates in the future. Under the newly named Maritime Offensive Surface Strike programme (MOSS), NSM had its initial operating capability declared on 19 December 2023 a week after the first set was successfully installed on HMS Somerset. However, following a series of defects and current lack of availability as of February 2024, HMS Somerset has yet to conduct a live-firing of NSM and has effectively seen a delay placed on the Royal Navy's escort fleet regaining a key surface warfare capability.

AUKUS backlash
In September 2021 the signing of a Memorandum of Understanding to progress the project was postponed by France in response to the AUKUS security pact which saw Australia cancel the acquisition of French-designed conventional submarines (Attack-class) in favour of nuclear submarines based on technology from United States and United Kingdom (SSN-AUKUS).

Missile concepts reveal
In February 2022, the UK and France signed a government agreement and associated contracts as part of the FC/ASW program. This also came with the announcement that the program had formally begun assessing two complementary concepts for the missile's design: a subsonic low observable missile and a supersonic missile with high manoeuvrability. It had been known that the program had already been examining supersonic and subsonic designs for the program prior to this. This announcement also appeared to confirm that program had discounted the development of a hypersonic missile akin to the conceptualised Perseus, instead choosing to invest further into subsonic/supersonic missile designs. Indications for a two-missile solution for the program had been publicly displayed almost a year prior at DSEI 2021; then previously described as subsonic and hypersonic solutions, it was reported by Naval News that the British were favouring the subsonic munition whilst the French were favouring the hypersonic option.

On 22 July 2022, Naval News reported that the UK's Roll-Royce and France's Safran had jointly signed an assessment phase contract with MBDA to collaborate in producing the propulsion systems for the FC/ASW program, predominantly around the subsonic missile design.

Italian membership
In June 2023 during the Paris Air Show, Italy signed a letter of intent with the UK and France to join the FC/ASW program, likely as a means of fielding future replacements both for Italy's Storm Shadow/SCALP stockpiles and for its indigenous Teseo anti-ship missiles. This also came with an announcement that FC/ASW was expected to leave the concept phase and launch the primary design phase starting in 2024 with the finished product(s) entering service around 2028–2030.

On 17 November 2023, Shepard News reported that Italy had confirmed its initial funding of €10 million out of €150 million for the development of FC/ASW between 2023 and 2028.

On 13 March 2024, during an annual review press conference, MBDA's chief executive Eric Beranger explained that France and the UK were still in discussions regarding the adjusted workshare following Italy's letter of intent.

Early design characteristics
The Italian funding announcement on 17 November 2023 also came with another timeline update stating that a deep-strike, land-attack variant would be delivered in 2028 and an anti-ship variant delivered in 2034, confirming that the programme would now produce two role-specific missile variants of as of yet unspecified designs.

Despite the earlier announcement in 2022 of complimentary subsonic and supersonic concepts, there was still confusion as to whether this was in fact confirmation of the programme actually producing two missiles or merely examining which of the two concepts best fit the requirements of all parties (potentially with some parties choosing to field one concept over the other). Some commentators such as Navy Lookout still continued to report at the time that a single weapon (including a hypersonic solution) was being sought. Others outlets such as Naval News saw it likely that a family of weapons were under development and that a predominantly French-designed supersonic missile, and a predominantly British-designed subsonic missile would be fielded together as two distinct but complimentary weapons. Others still were curious as to how the programme would meet the diverse surface-launched requirements of all parties, with the British seemingly requiring a vertically launched solution whilst the French and Italian navies with fewer strike-length vertical launch cells available likely requiring a canister-launched capability. It was still not known if the program was eventually to receive any submarine-launch capability to replace existing submarine-launched missile variants such as the Exocet SM39.

On 13 November 2023, defence journalist Gabriele Molinelli reported that MBDA UK had begun looking at suppliers for the design and manufacture of two weapons containers suspected to be for the FC/ASW program beginning in 2026. One was for a 7 x 0.7 m container with a total full weight of 3350 kg believed to be for naval vertical-launch systems; the other is to be 6 m and have a weight when full of over 2000 kg and believed to be for an air-launched effector. The confirmation suggests that the programme will produce at least one variant of the missile compatible with either the Mark 41 vertical launching system for the Royal Navy (likely for the Type 31 and Type 26 frigates) or the Sylver A70 for France and Italy vessels (possibly to replace France's existing cruise missile, the MdCN), or both.

In January 2024, in response to a written question from the Shadow Secretary of Defence John Healey on the in-service date of the air-launched variant, The Minister of State for Defence James Cartlidge said that "The planning assumption for service entry for the maritime-launched Future Cruise / Anti-Ship Weapon is 2028; a decision around which options, including off the shelf choices, should fulfil this requirement is ongoing, and will be confirmed in due course in the Full Business Case". On 14 May 2024, during the First Sea Lord’s Sea Power Conference, Admiral Ben Key told journalists that three missile options were being explored as part of plans to equip the Type 26 and Type 31 frigates with land-attack missiles: Tomahawk, NSM, and FC/ASW, with the former two options aligning with the "off the shelf" comments from James Cartlidge months earlier.

On 15 May 2024, in response to a programme update from former Secretary of State for Defence Ben Wallace, James Cartlidge confirmed that "Significant progress has been made on suitable candidate weapon systems to fulfil the Naval and Air requirements" and that the programme was currently focused on "reducing schedule risk, prior to the potential Demonstration and Manufacturing phases, and preparations are underway to prepare towards Full Business Case". He also confirmed that Italy had still yet to be brought into the programme.

Future operators
United Kingdom
 * 🇫🇷 France
 * French Air and Space Force
 * French Navy
 * 🇮🇹 Italy
 * Italian Air Force
 * Italian Navy


 * Royal Air Force - Expected to enter service on the Eurofighter Typhoon by 2030.
 * Royal Navy - Expected to enter service on the Type 26 Frigate by 2028. Potentially also to be integrated onto the Type 31 Frigate.

Similar missiles

 * AGM-158 JASSM - an American subsonic, low-observable, land attack cruise missile.
 * AGM-158C LRASM - an American subsonic, low-observable, anti-ship cruise missile derived from the AGM-158 JASSM.
 * ASM-3 – a Japanese supersonic anti-ship missile.
 * BrahMos – an Indo-Russian supersonic anti-ship missile derived from the P-800 Oniks.
 * Hsiung Feng III - a Taiwanese supersonic anti-ship missile.
 * P-800 Oniks – a Russian supersonic anti-ship missile.
 * YJ-12 – a Chinese supersonic anti-ship missile.