How Metal & Engineering Manufacturers Are Insured in the UK

Introduction

Metalworking and engineering businesses keep the UK moving—fabricating components, machining parts, welding assemblies, and supplying critical sectors like construction, automotive, aerospace, energy, and medical technology. But the same processes that create value also create risk: heat, sparks, heavy plant, high-voltage equipment, hazardous substances, and tight delivery deadlines.

Insurance for manufacturers in the UK is usually arranged as a package (often called Commercial Combined or Manufacturing Combined). It brings several covers together under one policy, with options to add specialist sections depending on what you make, how you make it, and where you trade.

This article breaks down how metal and engineering manufacturers are typically insured in the UK, what insurers look at, and how to avoid common gaps.

1) The core policy: Commercial Combined (Manufacturing)

Most UK metal and engineering manufacturers buy a combined policy because it can include:

• Property (buildings, tenant improvements, contents)
• Stock and materials
• Business interruption (loss of gross profit)
• Employers’ liability
• Public and products liability
• Tools, plant and machinery
• Goods in transit (optional)
• Money and theft (optional)
• Legal expenses (optional)

A combined policy can be simpler to manage than multiple standalone policies, and it reduces the risk of overlaps or missing sections.

2) Property insurance: buildings, contents, and stock

What it covers

Property insurance protects physical assets at your premises. For manufacturers, this usually includes:

• Factory/workshop buildings (if you own them)
• Office areas, stores, and yard structures
• Contents: benches, racking, compressors, extraction systems
• Stock: raw materials (sheet metal, bar stock), work-in-progress, finished goods

Key risks for metal and engineering sites

Insurers focus heavily on fire and theft, but also on:

• Hot works (welding, cutting, grinding)
• Dust and fume extraction (especially if you handle combustible dust)
• Flammable liquids and gas cylinders
• Electrical loading and maintenance
• Waste storage (oily rags, swarf, packaging)
• Yard security and out-of-hours access

Common “gotchas”

• Underinsurance: If sums insured are too low, claims can be reduced.
• Incorrect stock values: Many manufacturers have seasonal peaks or large one-off orders.
• Unspecified outbuildings: Stores, containers, and yard structures can be missed.

3) Business interruption (BI): protecting cash flow

What BI does

Business interruption covers the financial impact of an insured event (like a fire) that stops or reduces trading. It typically insures gross profit (turnover minus variable costs) and can include:

• Loss of gross profit
• Increased cost of working (e.g., temporary premises, outsourcing)
• Claims preparation costs (optional)

Indemnity period

The indemnity period is how long the policy will pay for loss of profit. Manufacturers often need 12–24 months because:

• Replacement machinery can have long lead times
• Tooling and commissioning take time
• Customer contracts may be lost if delays are prolonged

Supplier and customer extensions

Many policies can include:

• Supplier extension: if a key supplier suffers damage and can’t deliver
• Customer extension: if a major customer suffers damage and stops buying

These can be valuable for engineering firms tied to a small number of contracts.

4) Employers’ liability (EL): legally required

If you employ staff in the UK, employers’ liability is usually a legal requirement. It covers compensation and legal costs if an employee is injured or becomes ill due to work.

For metal and engineering manufacturers, EL claims can arise from:

• Manual handling injuries
• Machinery accidents
• Hearing loss from noise exposure
• Respiratory issues from fumes and dust
• Slips, trips, and falls in busy workshops

Most businesses buy £10 million of cover as standard, though higher limits may be needed for certain contracts.

5) Public liability (PL): third-party injury and property damage

Public liability covers claims from third parties (non-employees) who are injured or whose property is damaged due to your business activities.

Examples include:

• A visitor trips in the workshop
• You damage a client’s premises during installation
• A contractor is injured due to your site conditions

Limits are commonly £2 million to £10 million, depending on contracts and exposure.

6) Products liability: when your work leaves the site

Products liability is essential for manufacturers because it covers injury or property damage caused by products you make, supply, or alter.

For metal and engineering firms, product risks can include:

• A fabricated bracket fails and causes damage
• A machined component is out of tolerance and leads to equipment failure
• A welded assembly cracks under load

Product recall and rectification

Standard products liability typically covers injury/damage, not the cost to recall or replace faulty items. Some policies offer:

• Product recall cover
• Product rectification / efficacy cover (more specialist)

These can be relevant if you supply safety-critical sectors.

7) Professional indemnity (PI): for design, advice, and specification

Many engineering manufacturers also provide design input, drawings, specifications, prototyping, or consultancy. That’s where professional indemnity comes in.

PI covers financial loss caused by errors in professional services, such as:

• Incorrect design calculations
• Wrong material specification
• A drawing error that leads to rework and delay

If you offer any design-and-build service, PI is often requested by clients and can be a key contract requirement.

8) Machinery breakdown (engineering inspection): protecting critical plant

What it covers

Machinery breakdown (sometimes called engineering insurance) covers sudden and unforeseen mechanical or electrical failure of insured plant.

This can include:

• CNC machines
• Lathes, mills, presses
• Compressors and air systems
• Boilers and pressure systems (often with inspection requirements)
• Electrical panels and drives

Why it matters

Property insurance may cover fire or flood, but not internal breakdown. Machinery breakdown can cover:

• Repair or replacement costs
• Expediting expenses (rush shipping, overtime)
• Business interruption from breakdown (optional)

For high-dependency sites, this is often one of the most important add-ons.

9) Contractors’ risks and installation cover

If you install fabricated items on-site, you may need:

• Contract works cover (damage to work in progress on site)
• Own plant cover (for your tools and equipment)
• Hired-in plant cover (if you rent equipment)

This is common for structural steelwork, balustrades, staircases, and industrial fit-outs.

10) Goods in transit and marine cargo

Many manufacturers ship goods daily. Transit risks include theft, impact damage, water damage, and mishandling.

Goods in transit cover can be arranged for:

• Your own vehicles
• Couriers and hauliers
• UK-only or UK/EU/worldwide shipments

If you import/export, you may need marine cargo insurance to cover goods from supplier to your premises (and onwards to customers).

11) Commercial motor and fleet

If you have vans, HGVs, or company cars, you’ll need commercial motor insurance. Manufacturers often need:

• Fleet policies (when you have multiple vehicles)
• Cover for carriage of tools and goods
• Any driver vs named driver structures
• Occasional business use for staff vehicles (where appropriate)

12) Cyber insurance: manufacturing is a target

Engineering firms are increasingly exposed to cyber risk because of:

• Email compromise and invoice fraud
• Ransomware disrupting production
• Supply chain attacks through shared systems
• Theft of CAD files, designs, and customer data

Cyber insurance can help with:

• Incident response and IT forensics
• Business interruption due to cyber events
• Legal and regulatory costs (including data protection issues)
• Third-party claims

Even small manufacturers can be impacted if they rely on email, cloud storage, or networked machinery.

13) Directors’ & Officers’ (D&O) and management liability

If you’re a limited company, directors can be personally named in certain claims. D&O can cover legal defence costs and claims alleging wrongful acts in management.

For growing manufacturers, management liability packages may also include:

• Employment practices liability
• Corporate legal liability

This is more common once you have a larger workforce, external investors, or complex contracts.

14) Trade credit insurance (optional)

If you sell on credit terms, trade credit insurance can protect against non-payment due to insolvency or protracted default. It can be useful where:

• A small number of customers represent a large share of turnover
• You supply larger contractors with long payment cycles

15) What insurers look at when pricing manufacturing risks

Insurers typically assess:

• Process and hazards: welding, cutting, heat treatment, coating, galvanising
• Materials: aluminium, stainless steel, composites, hazardous substances
• Premises: construction type, age, roof materials, compartmentation
• Fire protection: alarms, sprinklers, extinguishers, hot works controls
• Security: shutters, alarms, CCTV, fencing, access control
• Maintenance: planned preventative maintenance, electrical testing
• Quality control: ISO standards, inspection regimes, traceability
• Contracts: liability limits, hold harmless clauses, overseas exposures
• Claims history: previous losses and improvements made

The more clearly you can explain your operations and controls, the easier it is to obtain broad cover at a fair premium.

16) Common coverage gaps to watch for

Metal and engineering manufacturers can accidentally leave gaps such as:

• No PI cover despite providing design/specification
• BI indemnity period too short for machinery lead times
• No machinery breakdown cover for critical CNC equipment
• Transit cover missing for high-value shipments
• Inadequate products liability limit for the sector supplied
• Exclusions for heat work, cutting, or specific processes
• Unclear “bona fide subcontractor” cover if you outsource work

A good broker will stress-test your policy against real scenarios rather than just comparing price.

17) Practical steps to get the right insurance

When you request quotes, prepare:

• A clear description of what you manufacture and how
• Turnover split by product/service and by territory (UK/EU/worldwide)
• Largest contract value and typical order size
• Details of any design work, drawings, or consultancy
• List of key machinery with values and ages
• Fire and security protections
• Risk assessments and health & safety approach
• Any accreditations (e.g., ISO 9001)

This speeds up underwriting and reduces the risk of misclassification.

18) How Insure24 can help

If you’re a UK metal or engineering manufacturer, the goal isn’t just to “have insurance”—it’s to have cover that matches your real-world risks, your contracts, and your growth plans.

Insure24 can help you:

• Build a combined policy that fits your operations
• Identify gaps around design liability, breakdown, and BI
• Set sensible limits and indemnity periods
• Present your risk well to insurers to improve terms

FAQs: Metal & engineering manufacturing insurance in the UK

Do I need employers’ liability if I only have one employee?

In most cases, yes. If you employ staff, employers’ liability is usually required by law, even for a small team.

Is products liability enough if I provide drawings?

Not always. Products liability covers injury/property damage from products. If you provide design, advice, or specification, professional indemnity is often needed to cover financial loss from errors.

How much business interruption cover should a manufacturer buy?

It depends on your gross profit and how long it would realistically take to recover after a major incident. Many manufacturers choose 12–24 months due to machinery lead times and customer retention risk.

Does property insurance cover CNC machine breakdown?

Usually not. Property insurance often covers external events like fire or flood. Machinery breakdown insurance is designed for internal mechanical/electrical failure.

What if I work on customer sites?

You may need extensions for off-site work, contract works, own plant, and higher public liability limits depending on the contract.

Do I need cyber insurance if I don’t store much data?

Even if you store limited personal data, ransomware and email fraud can still disrupt production and payments. Cyber cover can help with response costs and business interruption.

Call to action

If you want a quick, practical review of your current manufacturing cover—or you’re arranging insurance for a new workshop—Insure24 can talk you through options and provide a tailored quote.

Call 0330 127 2333 or visit insure24.co.uk to get started.