The UK Data Centre Buildout Is Moving at a Pace the Sector Has Never Seen Before

The numbers are difficult to ignore. The UK data centre market was valued at approximately $15.23 billion in 2025 and is forecast to reach $31.99 billion by 2031, growing at a compound annual growth rate of 13.17% over that period (Mordor Intelligence, 2026). In London alone, new supply delivered in 2025 and 2026 combined is forecast to reach 373MW — more than double the output of the previous two-year period (CBRE, 2026). For the fifth consecutive year, take-up is expected to exceed new supply, with a London vacancy rate projected to hit a record low of 5.9% by the end of 2026 (CBRE, 2026).

Driving this is not just cloud migration. It is artificial intelligence. Hyperscalers and a new class of GPU-compute providers — neoclouds — are racing to commission high-density, AI-optimised facilities across the UK. Major investments include Blackstone's $13 billion hyperscale campus in northeast England, Microsoft's £4 billion facility in Leeds, and Google's commitment of £5 billion to UK AI infrastructure and green data centres (Financier Worldwide, 2026; Bauhaus Recruitment, 2026; IMARC Group, 2026).

The UK Government has formally recognised data centres as critical national infrastructure and launched AI Growth Zones across Culham, Teesside, Newcastle, and Wales to streamline planning and accelerate private investment (Oxford Economics, 2026; CBRE, 2026).

What this means for MEP contractors, M&E consultants, and structural engineers is straightforward: the pipeline is extraordinary, the timelines are compressed, and specification decisions that used to be afterthoughts are now critical path items. Cable management is one of them.

Why Cable Management Specification Matters More Than Ever in Modern Data Centres

A hyperscale data centre is, at its core, a cable management challenge at industrial scale. Power distribution, fibre routing, earthing and bonding, and cooling infrastructure all depend on cable tray and ladder tray systems that perform reliably across a service life of 25 years or more — in an environment that operates continuously, tolerates almost zero unplanned downtime, and is increasingly pushing rack power densities beyond 30kW per rack for AI workloads (Mordor Intelligence, 2026).

Against that backdrop, the choice of cable tray material is not a minor procurement decision. It is a structural and operational specification with direct consequences for installation programme, maintenance overhead, EMI performance, electrical safety compliance, and total cost of ownership.

And yet, steel cable tray continues to be specified by default — often out of habit, not analysis.

The Problem with Steel Cable Tray in Data Centre Environments

Steel is a competent material in many settings. In the specific environment of a modern data centre, it introduces a cluster of problems that FRP/GRP eliminates entirely.

Corrosion. Data centres are not chemically aggressive in the way that wastewater treatment plants or offshore platforms are, but they do operate with controlled humidity, cooling water in proximity, and in coastal or urban environments with atmospheric corrosion risk. Steel cable tray in these conditions requires galvanised or epoxy-coated specification at installation, periodic inspection, and eventual replacement as coating degrades. In a live data centre environment, that maintenance cycle creates access risk and programme disruption.

Conductivity. Steel is electrically conductive. In a data centre, this matters for two distinct reasons: earthing and bonding requirements, and electromagnetic interference. Conductive cable tray requires careful integration into the earthing scheme, and bonding continuity must be maintained across every joint and transition throughout the system. Any break in continuity creates a compliance issue that must be identified, documented, and rectified — adding cost and complexity throughout the installation.

Weight. Steel cable tray systems are significantly heavier than FRP equivalents. In a data centre where cable tray runs are long, multi-tier, and often ceiling-suspended, the additional structural load imposed by steel tray, fixings, and support steelwork has to be accommodated in the building structural design. FRP/GRP cable tray, at roughly one quarter the density of steel, reduces imposed loads materially — a benefit that compounds at scale across a large campus.

Installation constraints. Steel cable tray requires two or more operatives for safe lifting, positioning, and fixing on most configurations. It cannot be cut on site without generating metal swarf that must be controlled in a clean environment. Modification requires planning, procurement, and often hot works permits.

Why FRP/GRP Outperforms Steel in the Data Centre Environment

Inherently Non-Conductive

FRP and GRP cable tray systems are electrically non-conductive by material composition. This single characteristic removes an entire layer of installation complexity from a data centre MEP package. There is no requirement for earthing continuity across the cable tray system, no bonding straps, and no risk of conductive fault paths developing through the tray itself. For consulting engineers designing M&E packages for Tier 3 and Tier 4 facilities where fault protection and earthing integrity are critical, specifying non-conductive tray eliminates a significant category of compliance risk at source.

It also simplifies the relationship between cable tray and busbar or UPS infrastructure, where maintaining clear separation between conductive and non-conductive pathways is operationally important.

Reduced Electromagnetic Interference

Steel cable tray, being conductive, can act as a pathway for electromagnetic interference — a particular concern in high-density compute environments where sensitive signalling cables and high-power distribution cables run in proximity. FRP/GRP cable tray is electromagnetically neutral, providing passive separation between cable types without introducing a conductive medium that can carry or amplify interference. For data centres handling latency-sensitive AI inference workloads, financial transaction processing, or high-frequency trading infrastructure, this is a meaningful performance specification advantage.

No Hot Works. No Welding. No Delay.

FRP/GRP cable tray can be cut, drilled, and modified on site using standard hand tools — no angle grinder, no hot works permit, no fire watch, and no COSHH risk from cutting galvanised steel. In a live data centre environment — or a construction programme where hot works create programme risk and safety obligations — this translates directly into faster installation, fewer permit applications, and lower residual risk.

This is one of the most consistently undervalued advantages of FRP/GRP in data centre applications. The visible cost saving on materials is sometimes modest. The invisible saving in programme time, permit management, and fire safety compliance during installation is frequently larger.

Single-Operative Installation

FRP cable tray sections are typically around one quarter the weight of an equivalent steel section. This means that, in most configurations, a single operative can lift, position, and fix a tray section without mechanical assistance. Across a large hyperscale installation with hundreds of metres of cable tray runs across multiple floors and ceiling heights, the labour saving compounds significantly. Independent analysis suggests FRP installation is typically 30% faster than an equivalent steel installation across comparable projects (JMFRP, 2025).

For MEP contractors pricing competitively on hyperscale packages where margin is tight and programme is critical, that differential is commercially meaningful.

Zero Corrosion. No Maintenance Cycle.

FRP/GRP does not rust. It does not require painting, coating, or surface treatment to maintain structural integrity in normal operating environments. Where steel cable tray in a data centre will require inspection, touch-up, and eventual section replacement over a 25-year asset life, FRP requires none of those interventions. The material's service life in non-aggressive environments is typically 50 years or more (GTOFRP, 2025). For an asset class where operational continuity is the primary design requirement, specifying a cable management system that requires zero planned maintenance across the building's service life is a straightforward engineering argument.

Structural Performance Without the Weight

Despite being substantially lighter than steel, FRP/GRP cable tray maintains high load-bearing performance across standard span configurations. For data centre applications where long unsupported spans between support fixings are required — reducing the number of penetrations through raised floors, suspended ceilings, or structural elements — FRP ladder tray offers the same functional load capacity as steel with a fraction of the imposed weight on the supporting structure.

What MEP Contractors Get Wrong at Specification Stage

The most common specification error with FRP/GRP cable tray in data centre projects is treating it as a direct like-for-like substitution for steel, without adjusting the supporting infrastructure design to take advantage of the material's different properties.

FRP cable tray does not need the same support bracket spacing as steel in all configurations, but this must be verified against the specific load case and span for the project. Mixing FRP tray with steel fixings without considering galvanic compatibility is another avoidable error, though FRP's non-metallic composition means galvanic corrosion between tray and fixings is not a risk in the way it can be between dissimilar metals.

At specification stage, the key parameters to establish are: tray type (trough, ladder, or mesh), width and depth configuration relative to cable fill requirements, resin system (standard polyester resin for most data centre environments; specialist resin systems for chemical exposure applications), fire performance requirements, and any project-specific testing or certification requirements for independent verification of material properties.

Reinforce Technology Group supplies FRP/GRP cable tray systems with independent test data suited to your specifc need. Fire retardant grade is available on request and must be specified at the quotation and specification stage.

Specifying FRP Cable Tray for a Data Centre Project: Where to Start

The specification conversation for FRP/GRP cable tray should happen early — ideally at RIBA Stage 3 or equivalent — when cable fill strategies, support structure design, and M&E zone allocation are still live. Retrofitting an FRP specification into a design that has been developed around steel weights and support spacings is workable, but it misses a significant proportion of the available benefit.

The key information needed to progress from specification to quotation:

• Intended application context and installation environment

• Cable tray type, width, depth, and configuration requirements

• Total run lengths and quantities by section type

• Required fire performance classification

• Any required third-party testing or certification

• Delivery location and programme dates

  
  

For data centre projects at hyperscale, regional colocation, or edge level, Reinforce Technology Group can provide specification support, sample material with test data, and bundled supply to project-defined drawings.

Conclusion

The UK data centre construction market is operating at a pace and scale that the sector has not previously experienced. Against a backdrop of compressed programmes, elevated performance requirements, and increasing scrutiny of installation quality on critical infrastructure projects, the default specification of steel cable tray deserves challenge.

FRP/GRP cable tray eliminates corrosion risk, removes conductivity and earthing complexity, reduces installed weight, speeds installation through single-operative handling and the elimination of hot works, and delivers a service life that matches or exceeds the design life of the facilities it is installed in. For MEP contractors and consulting engineers working on UK data centre projects at any scale, it is a specification that deserves to be evaluated on its technical merits — not excluded by familiarity with steel.

References

CBRE (2026) UK Real Estate Market Outlook 2026: Data Centres. CBRE UK. Available at: https://www.cbre.co.uk/insights/books/uk-real-estate-market-outlook-2026/data-centres (Accessed: 11 May 2026).

Financier Worldwide (2026) Booming industry: analysing UK data centre growth. Financier Worldwide. Available at: https://www.financierworldwide.com/booming-industry-analysing-uk-data-centre-growth (Accessed: 11 May 2026).

GTOFRP (2025) FRP service life and corrosion resistance in infrastructure applications. GTOFRP Technical Publications. Available at: https://www.gtofrp.com (Accessed: 11 May 2026).

IMARC Group (2026) UK Data Center Market Size and Forecast 2026–2034. IMARC Group. Available at: https://www.imarcgroup.com/uk-data-center-market (Accessed: 11 May 2026).

JMFRP (2025) Installation efficiency analysis: FRP vs. steel cable management systems. JM Fibre Reinforced Products Technical Report. Available at: https://www.jmfrp.com (Accessed: 11 May 2026).

Bauhaus Recruitment (2026) Microsoft's £4bn Leeds Data Hub — What It Means for the UK Data Centre Market. Bauhaus Recruitment. Available at: https://www.bauhausrecruitment.com (Accessed: 11 May 2026).

Mordor Intelligence (2026) United Kingdom Data Center Market Growth Report 2031. Mordor Intelligence. Available at: https://www.mordorintelligence.com/industry-reports/united-kingdom-data-center-market (Accessed: 11 May 2026).

Oxford Economics (2026) The UK's data centre boom: growth trends, drivers, and the rising power challenge. Oxford Economics. Available at: https://www.oxfordeconomics.com/resource/the-uks-data-centre-boom-growth-trends-drivers-and-the-rising-power-challenge/ (Accessed: 11 May 2026).

techUK (2025) How data centres can boost UK economic growth. techUK. Available at: https://www.techuk.org (Accessed: 11 May 2026).