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We’re delighted to welcome you to tRIIO!

We are a gas engineering business working in partnership with Cadent to improve the supply of gas to millions of people living and working in North London and the East of England.
We are a joint venture organisation, owned by Morrison Utility Services and Skanska UK specialising in the delivery of design and contracting services for the UK’s gas distribution network – replacing old mains, laying new ones, installing new connections to houses and commercial premises and helping with emergency response services.
But at the end of the day, the work we do is not just about engineering and numbers – it’s about sustaining and improving the quality of people’s lives.
This is our purpose. And we take immense pride in what we do and how we do it. Our ultimate aim is to ensure we provide the best possible service to our customers.
We hope you enjoy learning a little more about us on our website. If you have questions or comments, please don’t hesitate to contact us.

Multi occupancy buildings

For information on tRIIO works in your building click here

North Walsham gas mains work

Here you will find details on the gas mains work we are carrying out in North Walsham as part of a programme of works replacing ageing gas mains

Rochford gas mains work

This page contains details on the gas mains works to be carried out in Rochford

Colchester gas mains work

Details on the gas mains work to be carried out Colchester High Street as part of a programme of works replacing ageing gas mains

Translating this website

If English is not your first language, please use the ‘Select Language’ button at the bottom of this page.

(Disclaimer: Please note this site uses Google translation services and consequently we cannot guarantee the accuracy of this translation.)

Smell gas? Call 0800 111 999

Our code of conduct

Carbon monoxide awareness

Careers in tRIIO

Careers in tRIIO

What our customers say

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I commend the team for its efficiency and politeness whilst carrying out a difficult job.
The work was completed quickly and efficiently and exactly the way I had been advised. It was as if they were hardly there.

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Amazing. I cannot thank the team enough for its help, support, advice, professionalism and great spirit.

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I want to acknowledge your employee's hard work and say a big thank you – a very happy customer.

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The job was completed quickly and efficiently and always with a smile. The team is a credit to your company.

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The work carried out by your fitters was excellent, especially considering the bad weather at that time. A difficult job well done.

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Your employees were extremely polite and helpful and very diligent with regards to safety.

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Your team provided a responsiveness and flexibility that was entirely personal. They have been an utter delight to work with.

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I've never seen a team work like it! It's rare to see to great customer service. I'm very impressed!