Plastic injection moulding is one of the most widely used manufacturing methods for producing complex, high-volume plastic components. In London, a vibrant ecosystem of companies offers advanced moulding services, combining precision, innovation, and industry compliance.
Whether you’re a startup developing a new consumer product or an established brand seeking a high-volume manufacturing partner, London provides access to some of the UK’s best plastic injection molding companies.
This guide presents an in-depth overview of the top 10 plastic injection moulders in London, selected based on their capabilities, certifications, customer feedback, and industry reputation.
What Makes a Great Plastic Injection Molding Company in London?
London is home to dozens of plastic injection moulders but what sets the top companies apart from the rest? Here’s what sets the leading plastic injection moulders apart from the competition.
Commitment to End-to-End Services
Leading companies don’t just inject plastic they manage entire projects. From early-stage design consultation to finished part delivery, these companies provide integrated solutions to streamline production, reduce errors, and cut costs.
Modern Infrastructure and Equipment
State-of-the-art machinery such as fully electric injection presses, 3D printing for prototyping, and automated handling systems allow top companies to maintain tight tolerances and fast cycle times. Their investment in technology translates directly to better product quality and faster time-to-market.
Technical Expertise Across Industries
Top-tier firms often serve highly regulated sectors including medical, automotive, aerospace, and defence. These projects demand exceptional technical understanding, robust process control, and thorough documentation.
How Did We Choose These Top 10 Injection Moulding Companies?
The companies listed in this guide were carefully vetted using a combination of online data, professional directories, and client testimonials.
Verified Google Business Listings
Only companies with active business listings and verifiable customer reviews were considered. This approach confirmed that every company listed is active, reputable, and trusted by clients.
Website & Service Portfolio Analysis
We evaluated company websites for evidence of in-house tooling, material options, rapid prototyping, post-moulding services, and ISO certifications.
Industry Relevance and Longevity
Companies that have operated for more than five years and serve diverse industries were prioritised, as longevity often indicates a strong reputation and consistent client satisfaction.
Who Are the Top 10 Plastic Injection Molding Companies in London?
1. Pro Moulds Ltd – “Precision Moulding for Every Industry”
Pro Moulds Ltd is one of London’s top-rated plastic injection moulding firms, known for delivering accurate, high-quality components across various sectors. With a strong reputation for quick turnaround times and in-house toolmaking, they provide full-service moulding from concept to completion.
Their experienced team offers design assistance, prototyping, and production moulding using a range of thermoplastics. Pro Moulds caters to industries including electronics, automotive, medical, and consumer goods.
Core Strength
In-house tooling and rapid prototyping capabilities.
Ideal For
Companies requiring full product development and custom tooling.
Pricing: Custom quotes on request; competitive for low-to-medium volume.
- Website: https://www.promoulds.co.uk
- Phone: 01623 904 417
- Address: Burma Rd, Blidworth, Mansfield NG21 0RT
- Email: enquiries@pro-moulds.co.uk
Review: ★★★★☆
“Fast and knowledgeable team—helped us move from concept to production smoothly.”
2. Rutland Plastics – “Engineering Plastics Since 1956”
A stalwart in the UK plastics industry, Rutland Plastics combines decades of experience with cutting-edge technology. They specialise in gas-assisted moulding and 3D printing alongside standard injection moulding processes.
With ISO 9001 and ISO 14001 certifications, the company places strong emphasis on quality and sustainability. Their advanced manufacturing site in Wimbledon services both startups and multinational clients with equal precision.
Key Advantage
Extensive experience with technically demanding components.
Recommended For
OEMs seeking volume production and green manufacturing solutions.
Pricing: Available via consultation; tailored to project needs.
- Website: https://www.rutlandplastics.co.uk
- Phone: 01572 723 476
- Address: Rutland Plastics, Cold Overton Rd, Oakham LE15 6NU
- Email: enquiries@rutlandplastics.co.uk
Review: ★★★★★
“Highly reliable with great sustainability practices—perfect for large-scale production.”
3. RP Technologies – “Rapid Tooling, Faster to Market”
RP Technologies is renowned for its fast delivery of aluminium tooling and low-volume production. Located in Greater London, they offer CNC machined tools, rapid prototyping, and a focus on design-for-manufacture (DFM) to optimise production efficiency.
Their flexible service model suits customers needing quick iterations or shorter production cycles without compromising quality.
Standout Capability
Rapid tooling combined with DFM optimisation.
Preferred For
Short-run parts, prototyping, and time-sensitive launches.
Pricing: Starting from £3,500 for tooling; part pricing varies.
- Website: https://www.rptechnologies.co.uk
- Phone: +44 (0)1384 262845
- Address: Greater London, UK
- Email: info@rptechnologies.co.uk
Review: ★★★★☆
“They delivered a production-quality tool in under three weeks. Fantastic service!”
4. Plunkett Associates – “From Prototypes to Production”
Plunkett Associates provides integrated moulding solutions focused on high-performance applications. Their experienced engineers work closely with clients to develop products requiring tight tolerances and material expertise.
They specialise in complex geometry, small batch production, and technical plastic components particularly in aerospace and defence sectors.
Signature Strength
Precision for technically complex applications.
Best Matched With
Clients in aerospace or defence needing low-volume but high-spec parts.
Pricing: Tailored; typically mid-to-high end due to technical complexity.
- Website: https://www.plunkettassociates.co.uk
- Phone: +44 (0)1452 386608
- Address: Unit 4, Central Trading Estate, Cole Ave, Gloucester GL2 5HA
- Email: solutions@plunkettassociates.co.uk
Review: ★★★★★
“Professional and technical—helped us solve a critical engineering issue.”
5. Boddingtons Plastics – “Medical-Grade Moulding Excellence”
Boddingtons Plastics is one of the few UK-based moulders operating a Class 7 cleanroom facility. Holding ISO 13485 certification, these firms supply cleanroom-manufactured parts to sectors like healthcare, pharmaceuticals, and medical technology. Their facility in South East London supports tooling, injection moulding, and full documentation for regulatory approval.
Notable Feature
Medical-grade cleanroom production with ISO 13485.
Tailored For
Healthcare firms requiring sterile, regulated parts.
Pricing: Higher due to cleanroom standards; quotes on request.
- Website: https://www.boddingtons.co.uk
- Phone: +44 (0)1580 893333
- Address: South East London, UK
- Email: info@boddingtons.co.uk
Review: ★★★★☆
“Impressive compliance and documentation—great partner for medical moulding.”
6. Pentagon Plastics – “Moulding the Future with Integrity”
Pentagon Plastics is a well-established injection moulder offering concept-to-completion services. They design, develop, and manufacture tooling in-house and are known for building long-term partnerships with clients. Their transparency, attention to detail, and tooling guarantees set them apart in London’s competitive moulding sector.
Distinguishing Factor
Lifetime tooling support and transparent pricing.
Well-Suited For
SMEs looking for a long-term, collaborative manufacturing partner.
Pricing: Competitive and fully transparent; available on consultation.
- Website: https://www.pentagonplastics.co.uk
- Phone: 01403 264397
- Address: Unit 4, Blatchford Rd, Horsham RH13 5QR
- Email: websales@pentagonplastics.co.uk
Review: ★★★★☆
“They treat your project like it’s their own—outstanding service and support.”
7. Omega Plastics – “Innovative Solutions at Scale”
Omega Plastics is geared for high-volume manufacturing and rapid prototyping. With advanced tooling and automation, they serve clients in electronics, consumer goods, and packaging. Their ability to scale up quickly without sacrificing part quality makes them an attractive option for growing brands and international clients.
Key Edge
Large-scale moulding with advanced automation.
Top Fit For
Businesses needing cost-effective mass production.
Pricing: Cost-effective for high-volume orders; quotes based on part geometry.
- Website: https://www.omega-plastics.co.uk
- Phone: 01293 270100
- Address: Unit 17, The Stanley Centre, Kelvin Way, Crawley RH10 9SE
- Email: enquiries@omegaservices.co.uk
Review: ★★★★☆
“Helped us scale up production smoothly while keeping costs low.”
8. ASH Plastics – “Where Thermoforming Meets Moulding”
ASH Plastics offers a unique blend of vacuum forming and injection moulding services. Their hybrid capabilities cater to lighting, HVAC, and industrial sectors. With modern facilities and flexible production models, they’re a solid choice for clients needing both rigid and formed plastics under one roof.
Unique Skillset
Dual production capabilities in vacuum forming and injection moulding.
Most Suitable For
Projects requiring custom plastic fabrication with flexibility in design.
Pricing: Mid-range; flexible based on method (thermoform or moulding).
- Website: https://www.ashplastics.co.uk
- Phone: +44(0)1902 450 300
- Address: City House, Ettingshall Road, Wolverhampton, West Midlands, WV2 2JP, UK
- Email: hello@ashplastics.co.uk
Review: ★★★☆☆
“They handled a complex HVAC casing with no fuss—very flexible approach.”
9. Barkley Plastics – “Engineering Plastics with Precision”
Barkley Plastics delivers advanced moulding services with vertical and multi-shot moulding capabilities. Their clients span from automotive and telecom to home appliances. With a strong focus on process automation and robotics, they produce high-spec parts with low waste and fast cycle times.
Technology Edge
Vertical moulding and multi-shot production with robotics.
Strategic Choice For
Clients seeking automated, high-precision mass production.
Pricing: Scalable for mid-to-large runs; automation reduces per-part costs.
- Website: https://www.barkley.co.uk
- Phone: +44 (0)121 440 1303
- Address: 120 Highgate St, Birmingham B12 0XR
- Email: info@barkley.uk
Review: ★★★★☆
“The automation and quality consistency are impressive—good for scaling production.”
10. Amtek Plastics – “Sustainable Moulding for the Future”
Amtek Plastics leads the way in green manufacturing with closed-loop systems and eco-friendly materials. Their end-to-end service includes design, tooling, moulding, and post-processing. They work with both virgin and recycled polymers and help businesses improve their carbon footprint without compromising product quality.
Green Focus
Eco-conscious manufacturing with recycled and bio-materials.
Go-To Option For
Sustainable brands or startups prioritising environmental impact.
Pricing: Competitive; incentives available for using recycled plastics.
- Website: https://www.amtekplastics.co.uk
- Phone: 01626 830113
- Address: Ind Est, International House Battle Road Heathfield, Newton Abbot TQ12 6RY
- Email: ask@amtekplastics.co.uk
Review: ★★★★☆
“Loved their green materials and support—they aligned perfectly with our values.”
What Services Do These London-Based Injection Moulders Offer?
Product Design & Engineering Support
Most top companies provide comprehensive design services, including CAD modelling, material selection, and DFM analysis to ensure manufacturability and cost-efficiency.
Prototyping & Pre-Production
Rapid prototyping using SLA, SLS, or CNC machining helps refine designs before tooling investment. Some companies even offer bridge tooling to support interim production needs.
High-Volume Production Moulding
Once tooling is approved, firms can handle millions of cycles using thermoplastics such as PP, ABS, POM, and PC. To boost efficiency and reduce cycle times, many manufacturers utilise advanced moulding systems such as hot runners and multi-cavity tooling.
Finishing & Assembly
Post-moulding processes like pad printing, ultrasonic welding, and sub-assembly are offered in-house by several providers.
Why Choose a Local Injection Moulding Company in London?
Speed and Flexibility
London-based companies can deliver projects faster due to proximity. Quick face-to-face consultations and flexible response times are significant benefits.
Supporting the Local Economy
Hiring local businesses helps grow the UK manufacturing sector and supports employment while reducing the carbon footprint linked to overseas shipping.
How Do These Companies Handle Custom Plastic Injection Projects?
Custom Tooling
Each custom project begins with dedicated tooling, often CNC machined to match precise tolerances and surface finishes.
Industry-Specific Compliance
From FDA-grade materials for medical devices to flame-retardant polymers for electronics, materials are chosen based on the exact project requirement.
What Industries Do These Plastic Engineering Companies Serve in the UK?
Plastic moulding companies in London serve a broad spectrum of industries, including:
- Healthcare – precision, sterile components for diagnostics and surgical use
- Automotive – under-hood parts, clips, and brackets
- Consumer Electronics – durable and aesthetic enclosures
- Aerospace – lightweight, high-strength parts
- Construction – fittings, connectors, panels, and more
Are These Plastic Injection Moulding Companies ISO Certified?
ISO 9001 and Beyond
All listed companies hold ISO 9001 for quality management. Many also possess:
- ISO 14001 for environmental standards
- ISO 13485 for medical devices
- IATF 16949 for automotive quality assurance
How Do These London Companies Ensure High Precision and Quality?
Automation and Monitoring
Real-time monitoring software helps track injection parameters like pressure, temperature, and cycle time, ensuring minimal defects.
Quality Inspection Protocols
These companies use 3D scanning, digital calipers, and coordinate-measuring machines (CMM) to validate part dimensions before shipment.
What’s the Future of Injection Moulding in London?
Shift Toward Sustainable Materials
Bioplastics and recycled polymers are becoming standard materials as more firms integrate circular economy principles.
Industry 4.0 Adoption
London’s moulders are adopting smart factory technologies, including IoT-enabled machines and AI-driven quality control systems.
Conclusion
Finding the right plastic injection moulding partner in London isn’t just about proximity. it’s about precision, scalability, expertise, and service quality. The companies highlighted in this guide have demonstrated exceptional capabilities across various industries, from medical and aerospace to consumer goods and electronics.
Whether you’re looking for high-volume production, sustainable moulding, rapid prototyping, or medical-grade components, London offers a diverse range of providers to meet your exact needs. These firms combine decades of experience with modern automation and technical know-how, ensuring your plastic parts are manufactured with accuracy and efficiency.
FAQs About Plastic Injection Molding in London
What’s the cost of plastic injection moulding in London?
Prices vary based on complexity, material, and volume. Tooling may cost £3,000–£15,000+, while per-part pricing ranges from pence to a few pounds.
Do these companies serve international clients?
Yes, most London plastic moulders export globally and assist with compliance for foreign markets.
Can I request recyclable or biodegradable plastics?
Absolutely. Many firms offer PLA, rPET, and bio-based polymers upon request.
Is rapid prototyping available?
Yes, most listed firms offer 3D printing, CNC machining, and SLA for quick-turn prototypes.
Are non-disclosure agreements (NDAs) signed for new projects?
Yes, reputable moulders will sign NDAs to protect intellectual property.
Do these companies handle tool transfers?
Yes, if you have existing tools, most companies can inspect, adapt, and run them on their machines.
Are same-day consultations possible?
For urgent projects, many firms offer next-day or same-day consultations, especially within London.