Great experience. Engineer lovely, friendly, efficient. The engineer went the extra mile, helping us with an additional task that probably was not within his remit - which we were very grateful for. H... See more
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Company details
- Contractor
- Electrical Engineer
- Elevator Service
- Environmental Health Service
- Fire Alarm Supplier
- Fire Protection Consultant
Written by the company
Complii is a leading integrated provider of safety and regulatory compliance services across water and air, fire and security, electrical, and lifts and escalators. We support teams across complex, multi-site estates throughout the UK. As a trusted compliance partner, we work across many sectors, including hospitality, leisure, healthcare, education, retail and commercial property to reduce risk, assure regulatory compliance, and protect people, businesses and assets. Delivered through specialist divisions, our services provide high-quality, reliable outcomes. By consolidating multiple compliance disciplines under one trusted partner, Complii reduces supplier fragmentation, providing clear, comprehensive, cost-effective solutions all in one place. We simplify complex compliance legislation, providing you with assurance and confidence that compliance is being managed effectively. Working side by side with our clients, we deliver essential risk, regulatory, and compliance services across the built environment – helping to meet obligations, protect assets and reputations, and ensure the safety of customers and your workforce. From assessment and advice through to servicing, testing, and ongoing support, we focus on quality. We’re not just a supplier – we’re your trusted compliance partner, offering clarity, control, and peace of mind. We’re by your side, every step of the way.
Your Trusted Partner for Building Compliance
Written by the company
- By your side, every step of the way.
- We’re your trusted partner, here to help you navigate the often complex and confusing regulations surrounding building compliance. We work alongside your business, and the challenges you face, to provide end-to-end cost-effective solutions to meet all your building compliance needs. We pursue the highest standards and embrace continuous improvement in everything we do, helping to cultivate lasting relationships with our customers built on reliability and respect.
Contact info
85 Great Portland Street, W1W 7LT, London, United Kingdom
- 0330 043 4344
- trustpilot@complii.com
- www.complii.com
4.9
Excellent
228 reviews
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Wonder service
We have used Complii now for a number of years to look after all our compliance needs. The service we receive is outstanding, our contact Chris Mizen is so helpful and will always go the extra mile to support no matter what the problem is, i would highly recommend the services of Complii.
June 17, 2026
Unprompted review
Reply from Complii
Thank you for your feedback and continued trust in Complii over the years.
We’re delighted to hear that you’ve had such a positive experience with our service, and it’s especially great to know that Chris has been able to support you so effectively. We’ll be sure to pass on your feedback to him.
Providing reliable, responsive support to help our clients navigate their compliance requirements is at the heart of what we do, so it’s fantastic to see that reflected in your experience.
Reply from Complii
Thank you for your feedback Will. We are glad to hear our team is helpful and addresses concerns effectively.
Excellent Service
Engineer was prompt, pleasant, and professional. He worked quietly and efficiently, with the minimum of impact on our visitors. Excellent service.
June 17, 2026
Reply from Complii
Thank you for your review John. We're so glad to hear our engineer provided such prompt, pleasant, and professional service.
Logic's staff were amazing
Logic's staff were amazing, on time and very quick with their work.
June 17, 2026
Reply from Complii
Hi Joe,
We are so glad to hear our team provided such excellent and efficient service. Thank you for your kind words!
Best wishes,
Complii
Always excellent customer service
June 17, 2026
Reply from Complii
Hi Rob,
We're glad you enjoyed your experience. Thank you for your kind words!
Best wishes,
Complii
Celtic Fire delivers a terrific service…
Celtic Fire delivers a terrific service at reasonable costs, always reliable, very efficient and always happy to help at short notice. Well done.
June 16, 2026
Unprompted review
Reply from Complii
Hi Ian,
We're so happy to hear you appreciate our service and efficiency. Thank you for your wonderful feedback!
Best wishes,
Complii
Celtic Fire and Security..
We have used Celtic Fire and Security several times now, and the service that they provide is second to none. Honest, reliable and fast to respond. James Collins, the service manager, is brilliant at his job, very knowledgeable and really helpful. Would strongly recommend Celtic to anyone.
March 16, 2026
Unprompted review
Reply from Complii
Hi,
We are so happy to hear you've had such positive experiences with our team. We truly appreciate your kind words and recommendation. Thank you for your continued trust in our services.
Best wishes,
Complii
polite member of staff
polite member of staff, happy to crack on with the work required and not cause any disruption during this
June 16, 2026
Reply from Complii
Hi Natalie,
We're so glad to hear our staff provided excellent service and completed the work efficiently. Thank you for your kind words!
Best wishes,
Complii
Fire service
Friendly, professional gentleman.
Carried out service efficiently but quickly.
June 16, 2026
Reply from Complii
Hi,
We're glad our team provided a friendly, professional service and completed the job efficiently. Thank you for your feedback!
Best wishes,
Complii
Reply from Complii
Hi Lee,
Thank you for leaving us a review, we appreciate the kind words!
Best wishes,
Complii
We have continued to use Celtic Fire…
We have continued to use Celtic Fire Services for a number of years. They provide a thoroughly Professional Service. Graham and his team are exemplary in conduct ,courteous of manner ,easy of address, and steady firm in principle ,able and willing and well skilled to undertake the work.
Nothing appears too much problem and always on hand to answer any questions.
Totally recommend this Company.
Shotton Mill Company
June 16, 2026
Unprompted review
Reply from Complii
Hi Mark,
We are so pleased to hear about your continued positive experience with our services. It is wonderful to know that our team's professionalism and willingness to assist have been consistently appreciated. Thank you for your kind recommendation!
Best wishes,
Complii
Reply from Complii
Hi Joe,
We're so happy to hear this! We appreciate your kind words and positive feedback - we'll let Graham know what a great job he's doing!
Best wishes,
Complii
Very happy with Complii
I have been emailing the Complii company regarding a Legionella Risk assessment. They have been very professional, responding very quick, able to answer to all my questions. The gentleman that arrived on site today was punctual, polite and professional. He sat down with me, explained the procedures as well as the outcome at the end of the visit.
I highly recommend Complii.
June 16, 2026
Reply from Complii
Hi Claudia,
We are delighted to hear about your positive experience with our team. We appreciate your kind words regarding our professionalism and prompt responses. Thank you for recommending us!
Best wishes,
Complii
2nd to none
We have used Celtic Fire for years for all our restaurants/takeaways. I can't recommend them enough. Pricewise they are very competitive and the standard of their service is 2nd to none.
June 16, 2026
Unprompted review
Reply from Complii
Hi Mazzin,
We are so happy to hear you've had such a positive experience with our service over the years. We truly appreciate your kind words and continued support - we look forward to working with you again!
Best wishes,
Complii
Efficient Visit
The engineer who visited our site was friendly and efficient. Overall happy with the visit.
June 16, 2026
Reply from Complii
Hi Jolly,
We're so glad to hear our engineer provided friendly and efficient service. Thank you for your kind words!
Best wishes,
Complii
What made my experience great was that…
What made my experience great was that the contractor came onsite and was polite and explained what he was there to do. He was professional and had a good sense of humour.
June 15, 2026
Reply from Complii
Hi Audrey,
We're so glad to hear our contractor provided such a professional and pleasant experience. We appreciate you sharing your positive feedback!
Best wishes,
Complii
Jordan Housley the technician who…
Jordan Housley the technician who completes our sampling is always punctual and a pleasure to work with.
June 12, 2026
Reply from Complii
Hi Zak,
We are so glad to hear that Jordan provided such excellent service. We appreciate your kind words!
Best wishes,
Complii
Reply from Complii
Hi Stuart,
We're glad you enjoyed your experience. We appreciate your kind words.
Best wishes,
Complii
PAT Testing
Punctual, knowledgeable. Listened to customer requirements and carried out the tasks in a professional manner.
June 15, 2026
Reply from Complii
Hi,
We are so glad to hear that our team did a great job. We truly appreciate your positive feedback!
Best wishes,
Complii
Great company
Great company, we use them every year and they're thorough, helpful and a great price.
June 15, 2026
Reply from Complii
Hi Heather,
We are so happy to hear you appreciate our thoroughness. Thank you for your continued loyalty!
Best wishes,
Complii
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