Cambridge Marshall Aerospace Engineers Ballot for Strike Action Over Pay as Defence Aircraft Support Faces Possible Disruption

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Around 250 engineers at Marshall Aerospace in Cambridge are voting on possible strike action after rejecting a 4.5% pay offer. If industrial action goes ahead, maintenance support for C-130 Hercules aircraft and production linked to Boeing P-8 Poseidon programmes could be affected, while the dispute also raises broader questions about pay, workforce retention and the future of the aerospace business.

Pay Dispute Puts Marshall Aerospace Under Fresh Pressure

A fresh industrial dispute has emerged at Marshall Aerospace in Cambridge after hundreds of highly skilled engineers began voting on whether to take strike action over pay, creating uncertainty for one of the UK’s long-established aerospace engineering businesses. The ballot, organised by the union Unite, involves approximately 250 engineers responsible for maintaining military aircraft and supporting critical defence manufacturing activities, with the outcome expected to influence both workforce relations and operational continuity.

The disagreement centres on the company’s latest salary proposal, which offers a 4.5% pay increase that employees have overwhelmingly rejected, arguing that it does not adequately reflect rising living costs or years of declining real earnings. According to Unite, workers’ wages have fallen by around 16% in real terms since 2020 when measured against Retail Price Index inflation, leaving many employees dissatisfied despite the specialist nature of their roles.

Engineers Play a Critical Role in Defence Aviation

The engineers involved in the ballot carry out highly specialised work that supports military aviation programmes used by the UK and allied nations, making their expertise particularly difficult to replace within a short period. Their responsibilities include maintaining the C-130 Hercules transport aircraft while also manufacturing auxiliary fuel tanks used on the Boeing P-8 Poseidon maritime patrol aircraft, both of which remain important assets for defence and security operations.

Although the ballot itself does not immediately interrupt production or maintenance schedules, any future industrial action could create operational challenges if engineering activities are slowed or temporarily suspended. Defence programmes generally rely on skilled technical staff with extensive training and certification, meaning prolonged workforce disruption could affect maintenance timelines and manufacturing commitments.

Workers Reject the Company’s Latest Pay Offer

The dispute intensified after employees rejected the employer’s proposed 4.5% wage increase, arguing that it fails to restore purchasing power lost during several years of elevated inflation. Unite maintains that the proposed settlement does not recognise either the complexity of the engineers’ work or the contribution they make to nationally significant aerospace projects.

Union representatives believe a revised offer is necessary to prevent further dissatisfaction within the workforce, particularly as competing aerospace and engineering employers continue recruiting experienced technicians across the sector. Workers argue that improved salaries would not only reward existing employees but also help retain specialist talent in an increasingly competitive labour market.

Union Says Business Can Afford Higher Salaries

Unite has argued that Marshall Aerospace possesses sufficient financial strength to improve its pay proposal and reach an agreement without industrial action, pointing to the wider Marshall Group’s ongoing commercial developments. The union says the value generated through the redevelopment of the group’s Cambridge land holdings demonstrates that greater investment in employees would be both reasonable and sustainable.

Unite General Secretary Sharon Graham stated that the company has the financial capacity to improve its offer and urged management to return to negotiations with a more acceptable proposal. The union also reaffirmed its commitment to supporting members throughout the dispute while continuing to encourage meaningful discussions aimed at reaching a settlement.

Wider Business Changes Add to Employee Concerns

The pay disagreement arrives during a period of significant change for the Marshall Group, increasing uncertainty among employees already facing questions about the company’s future direction. Earlier this year, Marshall announced plans to relocate Marshall Land Systems from Cambridge to Wales, a decision affecting nearly 200 workers and highlighting broader restructuring within the organisation.

At the same time, Marshall Aerospace has confirmed that it is pursuing a sale process, although details regarding any potential purchaser have not been publicly disclosed. Employees have also been informed that operations at the Cambridge site are guaranteed only until the middle of 2029, creating additional concerns over long-term employment stability alongside the current pay dispute.

Retaining Skilled Aerospace Engineers Remains a Major Challenge

The aerospace industry continues to experience strong demand for experienced engineers, technicians and maintenance specialists as defence spending increases across Europe and allied nations. Employers throughout the sector are competing for qualified professionals whose technical expertise is essential for maintaining military aircraft and delivering complex engineering programmes.

Unite argues that failure to improve pay could encourage experienced employees to seek opportunities elsewhere, potentially making recruitment and retention more difficult for Marshall Aerospace in the years ahead. Losing skilled personnel would not only affect current operations but could also reduce the company’s ability to deliver future contracts requiring specialist engineering knowledge.

Strike Could Affect Military Aircraft Support

Should employees vote in favour of industrial action after the ballot closes, Marshall Aerospace may face disruptions across parts of its defence support operations depending on the scale and duration of any strike. Maintenance schedules for C-130 Hercules aircraft, together with manufacturing activities linked to Boeing’s P-8 Poseidon programme, could experience delays if sufficient engineering resources become unavailable.

While the precise operational impact would depend on the eventual form of industrial action, specialist aerospace work often requires certified engineers whose responsibilities cannot easily be reassigned. Even temporary reductions in staffing levels may therefore influence maintenance planning, production schedules and contractual delivery timelines.

Union Leaves Door Open for Negotiations

Despite preparing for possible industrial action, Unite has stressed that negotiations remain the preferred route toward resolving the dispute before any strikes take place. Regional Officer Neil Moore said the company still has every opportunity to improve its proposal and avoid disruption by presenting an offer that better reflects employees’ skills, experience and long-term contribution.

The union maintains that competitive salaries and improved job security would strengthen workforce confidence while helping Marshall Aerospace retain experienced engineers during a period of wider organisational change. Management and union representatives therefore still have time to reach a compromise before any industrial action is formally announced.

Ballot Result Will Determine the Next Stage

The current ballot is scheduled to close on 21 July, after which Unite will determine its next course of action based on members’ votes. If employees support industrial action, the union is expected to announce strike dates and further details regarding planned action in accordance with UK industrial relations procedures.

Until the ballot concludes, normal operations are expected to continue while discussions remain possible between both sides, leaving open the prospect of a negotiated settlement that could prevent disruption. Whether agreement is reached or industrial action proceeds, the outcome is likely to have important implications for Marshall Aerospace’s workforce, future business stability and its role in supporting key defence aviation programmes.