Infrastructure companies in the UK

This is a directory of the companies behind UK infrastructure: the firms that build it, run it, own the networks and advise on it. It is not a directory of projects. For projects, the government publishes the UK Infrastructure Pipeline: 734 projects worth £718bn, as at its 9 March 2026 edition.

The listings

41 firms. Listed A to Z: none has been claimed yet, so none is marked Verified. Browse by group: Contractors (10) · Utilities (20) · Operators and concessionaires (5) · Advisers (6).

Each was checked at Companies House on 23 September 2026. Two more firms are held until their Companies House filings update.

Who can be listed

Four kinds of firm, as described on the infrastructure hub:

1. Contractors, main and specialist
2. Operators and concessionaires
3. Utilities
4. Advisers, such as engineering, cost, planning and legal firms

A firm goes in the group that matches the work it has done, not the one it would like to be in.

The listing rules

These rules are stricter than the ones for our trade listings. We expect the people checking these firms to need the legal entity, not just the trading name, so the rules start there.

1. A Companies House number, or no listing. Every firm here must match an active company, LLP or other registered entity at Companies House. We show the legal name, the number, the status and the date we checked. If a firm trades under a brand, we show both names and say which one holds the contracts. A firm that is dissolved, or in liquidation on the day we check, is not listed.

2. What they actually build, from a public source. We describe work a firm has completed or is delivering now. That means work named on its own website, in a published contract award, or in a regulator’s record. We do not publish capability statements (“we can deliver schemes of any size”). If we cannot find public evidence of a type of work, we leave it out.

3. Region, in plain words. We show the registered office town and the regions the firm says it works in. Where a firm works nationally, we say “UK-wide” and nothing grander.

4. No paid rank. Nobody can pay to appear, to move up, or to be left out. The default order is the same as on every Whito directory page. Verified listings, where the firm has claimed its listing and confirmed its details, come first. After that the list is alphabetical. Claiming is free.

5. Figures only from filings. If a profile shows turnover or headcount, it comes from accounts filed at Companies House, with the period stated. We do not repeat figures from press releases or pitch decks.

6. No stars, no reviews, no badges for sale. We do not host reviews. Scheme and framework memberships are shown only where we can point to a public record, and are labelled “stated” where we cannot.

7. Public bodies are explained, not listed. Public bodies that commission infrastructure are explained in our research notes, not listed as businesses. HS2 Ltd and National Highways buy the work rather than supply it, so none of the four groups fits them.

What a listing shows

What a listing is not

It is not a recommendation, a prequalification or a sign that a firm is on any framework. It is not a credit check. It is a dated, checkable description of a real company. Anyone buying infrastructure work should still run their own due diligence.

Want to be removed, or corrected?

Email hello@whito.co.uk. We correct facts against the source, free, and we will remove a listing on request without asking why.