We go beyond compliance, building scalable, pragmatic governance that supports ambition, giving the board confidence and the executive team room to focus on growth.

Why work with us

Our mission is to make our clients’ lives easier by taking away as much of the “noise” as we can to enable them to focus on delivering shareholder value. We focus on:

being supportive, constructive and forward-looking.
providing proactive clear, robust and pragmatic advice.
creating and delivering robust governance structures and processes that actively help the Board and business to function effectively and ensuring these are right-sized to the business as it grows.
removing as much of the “compliance noise” as we can through predictable, well thought out and proportionate processes and planning which steer our clients through their regulatory and compliance journeys with the minimum fuss. We take on a lot of routine, but necessary, workstreams and deal with them quietly in the background to minimise distractions to management.
being part of your team. We are interested in our clients’ businesses, future and people. We enjoy being part of the journey with our clients and seek to become a trusted first line adviser.

Browse our Private Company Governance and Compliance, PLC Governance and Compliance and Project Management pages to find out how we can help you, or contact us here and see how we can assist you on your journey.

Who we work with

Expert Solutions

Explore our comprehensive solutions designed to guide you through your governance and financial reporting requirements with confidence and ease.

Services We Offer

PLC Governance and Compliance

One Advisory has provided fully outsourced company secretarial and governance services, including named company secretary roles, to London‑listed PLCs for over 10 years. We establish governance and compliance frameworks during the IPO process and operate them post‑listing in line with the annual financial cycle, as well as offering scaled support to in‑house Company Secretaries.

Private Company Governance and Compliance

One Advisory works with private groups including startups, PE-backed businesses and established family-owned enterprises, providing appropriate governance structures and processes, ensuring compliance, supporting effective reporting to investors and readiness for exit.

Board Effectiveness Reviews

One Advisory offers a suite of flexible Board evaluation services to support continuous improvement at the highest level. Our ongoing work with our client Boards gives us a front row seat to the challenges and opportunities faced by Boards every day and this informs our forward-looking, pragmatic and supportive approach to our role as reviewers.

IPO Preparation and Support

One Advisory supports clients through the IPO process by establishing Board and Committee governance structures and implementing the policies and processes required to meet listed company obligations. Working alongside our FRP Financial Reporting and Transaction Advisory colleagues, we also support all IPO financial workstreams, including FPPP preparation, IFRS conversions, HFI preparation and working capital memoranda.

Group Simplification

Working with our colleagues in FRP, we deliver comprehensive corporate simplification programmes to assist you to simplify the group structure by closing out dormant and uneconomic entities, untangling intergroup positions and streamlining reporting. A Corporate Simplification project will also eliminate unnecessary and duplicated cost, reduce the risk profile of the group and create time for management to focus on value creation and growth.

ESG Advisory & Sustainability

Working with our colleagues in FRP, we support our clients with compliance with mandatory sustainability reporting standards, strategies to reduce operating costs, and guidance in securing EU and UK environmental sustainability grants. We focus on improving ESG ratings, implementing environmental strategies, and conducting thorough ESG assessments.

Other Governance Projects

We support with a variety of standalone projects including due diligence exercises, data room preparation, annual reporting project management, drafting and compliance exercises, policy drafting and transaction support.

Financial Reporting and Other FRP Services

Our FRP colleagues offer a wide range of complementary services, click here to find out more.

Don’t take our word for it, hear from those who know us best

”IPOs are complicated and can be hugely distracting for management teams. One Advisory are experienced and technically excellent whilst also being sympathetic to a resource constrained finance team. Time and again we hear from management teams how One Advisory have taken ownership of critical workflows and delivered the required information seamlessly, freeing management to devote more time to our Sales and Broking teams to deliver a successful IPO of their business.
David Foreman, Deputy Head of PLC AdvisoryZeus

”The One Advisory team has supported a number of clients with an in-depth knowledge of IFRS and Company Law, across a broad range of technical areas – and have provided specialist accounting advice to private and listed companies across a diverse range of sectors, including GAAP analysis, preparation of financial statements and disclosure reviews. We would recommend One Advisory to companies seeking to IPO on the UK market.
Mitesh Patelia, PartnerCrowe

”One Advisory’s experience and technical expertise in delivering on an IPO engagement of companies looking to list on the main market or AIM is excellent. We worked closely with One Advisory on a main marketing listing and found One Advisory to take ownership of critical workstreams, which included the preparation of the historical financial information and the FPPP memo. We would recommend One Advisory to any company that is looking to IPO in the UK.
RSM, PartnerRSM

”Our Nomad recommended that we engage with Matt and the Governance team at One Advisory early on in our IPO timetable and I’m so glad that we did. Their advice and support as we transitioned AOTI from a private US company onto AIM was invaluable, especially in guiding our adoption and embedding of the appropriate governance frameworks. The One Advisory team were always on hand whenever needed and quickly earned the trust and confidence of AOTI’s management team. We are pleased to have retained One Advisory as our Governance and CoSec advisers post-IPO and we look forward to working together on our journey as a London listed company. I would have no hesitation in recommending One Advisory’s services to any business either on or seeking to join the LSE.
Doug Lefort, Non-Executive ChairmanAOTI, Inc

”The IPO process was new for most of our team and we were grateful for the work One Advisory did for us to enable us to prepare all of the documents that were required on a tight timeline. They are a team of experts in what they do and we have gained a lot of knowledge from working with them during this process. I would recommend any company seeking a listing in London to engage with One Advisory early on in the process.
Mark Williams, Former CEOOcean Harvest

”One Advisory's finance team have assisted us for a number of years on complex financial reporting requirements including PPAs, IFRS impact assessments and advice on specific IFRS standards, accounting for debt instruments (with embedded derivatives) and drafting IFRS and FRS 101 statutory accounts templates for multiple entities. I would have no hesitation in recommending One Advisory to companies dealing with complex reporting requirements, particularly those that arise in private equity fund structures following changes in ownership.
Richard Rose, CFOHorizon Energy

”It was our nomad that recommended that we speak to One Advisory at the outset of our IPO journey and I’m thankful, that we did. Their IPO Finance Support team were extremely professional and efficient throughout the transaction, particularly given the timescales we set for listing, as well as our recent acquisition activities that added complexity during our due diligence phase. The team at One Advisory were also very responsive and great people to deal with so we would have no hesitation whatsoever in recommending their HFI and FPPP Services as well as their IPO Project Management capabilities to other companies looking to IPO in London.
Chris Day, Former CFOLords Group Trading Plc

”One Advisory came highly recommended for delivering complex financial workstreams for IPOs, and I’m pleased to say that they absolutely delivered. They hit the tight timescales that we were working towards, with professionalism as well as personality. I would have no hesitation in recommending their services to other companies looking to IPO. One Advisory’s Governance team also provided valuable advice and support pre-IPO and I’m pleased to have retained them as our Company Secretary post-IPO, and I look forward to continuing to work together on our next chapter as a plc.
Dan Walden, CFOProcook Group Plc

”One Advisory always go that extra mile to help us, especially when our reporting deadlines are approaching. They have a flexible and pragmatic approach and listen to their clients.
Kurt Budge, Former CEOBeowulf Mining Plc

”I was recommended to speak to One Advisory by our Nomad in September, three and a half months before the AIM IPO date, as they said One Advisory will be able to deliver the complex workstreams within the tight timetable that had been set. I have to say that they absolutely delivered, hitting all of the milestones set with both professionalism and personality. CFOs are always forewarned ahead of an IPO of the significant workloads involved in the process, but I honestly cannot imagine it being possible without the assistance of One Advisory. We would have no hesitation whatsoever in recommending their IFRS conversion and FPPP Services to other companies looking to IPO in London. One Advisory’s Governance team also provided valuable advice and support pre-IPO and we’re pleased to have retained them as our Company Secretary post-IPO.
Neil Evans, CFOFacilities by ADF Plc

”The One Advisory Financial Reporting Team demonstrated exceptional professionalism and support throughout our relisting process. Despite a tight timeline, which included significant amendments along the way, they efficiently developed a comprehensive working capital model, prepared our FPPP for the expanded Group, conducted the HFI for a target company, and assembled our Proforma of Net Assets for the Admission Document. Their expertise and dedication were evident, making them a pleasure to work with, and they interacted exceptionally well with the Reporting Accountants. If you're considering listing or relisting on the stock exchange, I highly recommend their financial reporting services—they’ve been an invaluable partner for us.
Elizabeth Lake, CEOEARNZ Plc

”ONE Advisory did an outstanding job managing our HFI and FPPP workstreams during our IPO process. Their expertise and professionalism ensured everything was executed smoothly and efficiently. We highly recommend their services to any other client navigating an IPO.
Heidi Giles, CFOOptima Health Plc

”We chose One Advisory because of their breath of experience and because we liked the team. The team delivered at every stage of the IPO and we were delighted with the work they did for us.
Joe Pollard, CFOApplied Nutrition Plc

”One Advisory worked seamlessly and tirelessly between our advisors and our internal financial and technical teams, and we very much appreciated their professionalism throughout.
Steve Moore, CFOMHA Plc