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
Company replied

While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Created with AI, based on recent reviews
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.
Written by the company
85 Great Portland Street, W1W 7LT, London, United Kingdom
Asks customers to review
This company invites their customers to review, whether positive or negative
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Efficient company who came out quickly. It turned out to just be a battery replacement but the man was very friendly and didn't make us feel silly at all! Better to be safe than sorry.

Reply from Complii

Reply from Complii

Reply from Complii
The manner in the lady deals with possible clients is exceptional. Polite, friendly, helpful and knowledgeable with a desire to help.
Thank you Tia Salmon

Reply from Complii

Reply from Complii
Great job by Celtic Fire installing fire safety equipment and linking to existing system.
James and Jay were professional and courteous.
Would highly recommend.

Reply from Complii

Reply from Complii
The lady who did our PAT testing was lovely, very fast and listened to everything we wanted

Reply from Complii
The Engineer was very accommodating and worked well to get the job done.

Reply from Complii
Your Engineer Rhys Hills who visited Hilary Lodge today 05/06/2026 was excellent. Not only did he carry out his review duties professionally and efficiently, but he also went above and beyond to help residents. Whilst on site, he was approached by an elderly resident who asked for assistance with kitchen drawer issues, rather than walking away, he took the time to help, he also kindly assisted an elderly resident whose kitchen cupboard screw had come loose, using his drill, he repaired the drawer quickly and safely, ensuring it was fully functioning again.
His willingness to help with these additional tasks demonstrated great care, initiative and commitment to supporting residents. His kindness and practical assistance were very much appreciated and made a positive difference.
Thank you for employing such great staff, his helpful and dedication to our residents are a credit to your organisation.

Reply from Complii
The Zeta team manage our sampling PPMs and have always been very responsive to any additional needs we have with this.

Reply from Complii
Very friendly and super helpful staff. They go above and beyond to ensure the work is done do a very high standard with no fuss.

Reply from Complii
We must complement James Collins for his hard work and honesty. We definitely would use him again

Reply from Complii
We have bi yearly visits to our Clapham store. We have the same PAT Tester and is always efficient, friendly and reliable and even tidyies up after themselves!

Reply from Complii
The work was carried out with minimal disruption and the engineer was very courteous and diligent. The communication was also very good.

Reply from Complii
We continue to receive first-class service from Celtic Fire, a huge part of that is thanks to James, the Service Manager. He makes scheduling and managing our fire safety completely effortless. James is incredibly professional, responsive, and always ensures everything runs smoothly. It is rare to find this level of consistent, high-quality customer care. Highly recommend James and the whole Celtic Fire team!"

Reply from Complii
Celtic Fire are amazing, standard of service, quality of work, customer service and overall response is unquestionable. Jay and the team are always looking to suppprt with challenges and are excellent working in sometime challenging environments. We can’t recommend these guys enough especially within the housing world.

Reply from Complii
Celtic Fire have serviced the fire equipment at our managed blocks for over 4 years. They are always happy to help and provide their support and knowledge. Namely the Service Manager James Collins and their engineer Tyrone Mardon, who are fantastic and a pleasure to work with!

Reply from Complii
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.