Eleven pieces trace UK economics consultancy from 2000 to 2026, using a curated 90-firm catalogue, filed accounts where available and dated public sources.
The catalogue follows 90 firms associated with UK economics consultancy. It is a research directory, not a census. Their clients include companies, law firms, regulators and government bodies, as Cebr’s 2018 sector study also found. The series uses selected firms, people and events to examine competition, regulation, litigation and public policy. It does not pretend that those examples measure the whole market.
The interactive explorer includes 30 selected legal entities with positive turnover observations. Together they report £2.4418bn (£2.44bn). Each figure is the latest available for that entity; the year-ends run from July 2024 to December 2025, rather than sharing one filed year. Two foreign-currency rows assume €1=£0.85 and $1=£0.78 for analysis. The total is gross reported turnover and includes non-economics work inside broad and litigation consultancies. It is neither UK sector revenue nor a lower bound for it.
For comparison, Cebr reported sector revenue of £1.53bn for 2016/17 and nominal average growth of 11.3% over three years. Extend that old rate mechanically for eight years and the result is £3.60bn for 2024/25. This is the author’s scenario, not Cebr’s forecast or an upper bound.
The history runs from 2000 to 2026. It combines separate Companies House accounts, where available, with dated announcements, firm histories, obituaries, press reports and selected material from Global Competition Review. The dataset, code and source archive are not yet a complete public release. Where the prose goes beyond the records, it says whether the claim is thesis, hypothesis or commentary. Start anywhere.
Thirteen charts introduce the 90-firm catalogue. They use the latest available 2024–25 disclosures, not a single-year snapshot. The 30 entities with positive turnover observations report £2.4418bn in gross turnover. RBB’s FY2025 operating margin was 56.26%, the highest disclosed in the published sample; its Companies House filing history supplies the record.
Two interactive maps and a force-directed graph show where the firms sit and how they connect. The UK view has 80 office/entity rows, including legal or brand duplicates, so it does not show 80 distinct active catalogue firms. The global network and world map share a filter; the UK registered-office map stands alone.
Explore the 90-firm catalogue. Filter by segment and structure; compare staff, turnover, margin or top-earner pay; add and remove firms. The chart and totals recalculate at once.
The market had not yet assumed its modern shape. A portrait of four firms, 14 people and three influential cases makes the argument. These are selected examples, not market totals.
NERA was established; its alumni were restless. Derek Ridyard, Simon Bishop and Simon Baker founded RBB Economics in 2002, as RBB’s history records. In the project’s small comparable LLP sample, FY2025 profit available to RBB members was £60.226m. Divide that by 18 average members and the result, £3.346m each, is the highest disclosed row.
LECG collapsed in 2011. Compass Lexecon then announced the acquisition of its European competition team of more than 40. In October 2014, LDC invested in Capital Economics. The article reads that deal as an early sign of investor interest, not proof of a market-wide turn.
US-linked advisers expanded in London. A second large private-equity transaction followed in 2018, after LDC’s 2014 investment in Capital Economics. Brexit may have helped regulatory advice grow; the article treats that link as a hypothesis, not a proven sector-wide effect.
RBB’s FY2025 accounts report 18 average members and a registered office at 199 Bishopsgate, but not exclusive use of a whole floor. Three deals show different routes to capital: McKinsey buying Vivid Economics and Planetrics; Jacobs buying the rest of PA Consulting in March 2026; and Econic’s disclosed financing. “Acqui-hire” and “breakaway” are the article’s interpretations.
Five named senior Competition and Markets Authority economists entered private-sector roles between January 2023 and January 2026. Stefan Hunt’s documented route runs from the CMA through Keystone Strategy to AlixPartners. The evidence includes Frontier Economics’ announcement of Mike Walker and AlixPartners’ announcement of Julie Bon.
A chord diagram traces selected senior moves from 2000–2026 through 19 aggregated firm-to-firm ribbons. A ribbon can combine several people and seniority, so its weight is not a reproducible count of individual moves. The chart shows the visible senior layer, not every career in the market.
How the author learnt to build a 90-firm Companies House pipeline in ten days and roughly 60 interactive hours, then turned it into an eleven-piece series. The article explains the assembly and review. It does not claim that a complete public release is available.
About the series. Leath Al Obaidi wrote it in a private capacity. The description of the work as independent and uncommissioned is the author’s declaration. The catalogue and prose remain living research materials; no immutable public dataset release or April 2026 snapshot has been published. Dates and coverage limits sit beside the relevant figures. Corrections are welcome via leathalobaidi.com.