About us

Haberman Ilett provides exclusively accounting expert witness and related services in UK and international litigation, arbitration, and alternative dispute resolution.  Founded in September 2013, we are the largest independent firm of our type in the country.

We provide expert evidence in matters arising from commercial and contractual claims, shareholder disputes, investment treaty claims, competition and anti-trust cases, and those arising out of corporate transactions.  We also act as the expert determiner, or for the buyer or seller, in completion accounts disputes.

We distinguish ourselves from our competitors by offering a truly independent service.  Where large firms are constrained by their wider commercial relationships, we are a dedicated forensic firm that combines the knowledge and experience gained by our team in the Big Four and other firms with the agility and focus that comes with being a specialist practice.

If there is an accounting or financial aspect to your dispute, please contact any of our partners or directors.

Leadership team

Our founding partners, Philip Haberman and Frank Ilett, are two of the best-known expert witnesses in the world.  Between them they gained more than 30 years’ partner experience before launching Haberman Ilett LLP in September 2013.  Initially with four fee earning staff, including Vikki Wall, who is now a partner, the firm focused on building a high-quality team that could take on substantial cases.

In September 2014, Valery Knyazev joined as partner and Debbie Revill joined as director.  Liz Perks and Bruno Augustin were promoted to partners in March 2015 and Graham Nunns became a director in January 2017.  By this time, the firm was made up of 38 fee earners working on cases where the damages claimed range from USD 10 million to more than USD 10 billion.

So far in our short history, members of the Haberman Ilett team have given evidence in the witness box 18 times and we have been involved in more than 100 cases.

Please click here for information about our Women’s Network.


Bruno Augustin is super responsive and very bright
Who's Who Legal 2016

Thank you for your analytical observations, keen business judgment and cooperation on so many levels.
Client

Liz Perks is very good, easy to work with and quickly provides sensible and well-prepared opinions
Who's Who Legal 2016

Many thanks for all your invaluable assistance, time and hard work over the past months.
Associate

Valery Knyazev is simply the best for Russian-language matters
Who's Who Legal 2016

I found it to be an easy process working with such friendly yet a very professional team. I would have no hesitation in recommending their services.
Client

I should take the opportunity to express our thanks for all the hard work which you, [and the Haberman Ilett team] have put in over the past year or so.

Thanks to you for your professionalism and hard work…. I’m almost sorry this is coming to an end.
In house Counsel

I cannot recommend [partner] enough and only wish we had engaged his services earlier as our previous accounting support had taken us down the wrong route.
Group Finance Director

[Assistant director] and [partner] were an absolute pleasure to work with … we couldn’t have had a better team.
Senior associate

I would advise anyone facing [an unexpected warranty claim] to immediately employ Haberman Ilett and not to waste any time or money with mediocre and expensive advice from more generalist accountants.
Chief executive

Throughout our relationship with [partner] and his team we always felt that the advice we were getting was impeccably prepared, totally sound, well presented and pragmatic.
Group Finance Director

A cracking outcome on the compensatory side of things and your work was invaluable in ensuring that. Your expertise, commitment and responsiveness were greatly appreciated throughout.
Senior associate

You have been incredibly helpful and responsive and the report and further advice which you have prepared has been really first-rate.
Associate

[Partner’s] almost immediate but thorough assessment of our position was very clearly presented and absolutely compelling, which gave us the confidence to defend our position without compromise.
Group Finance Director

You have fulfilled your brief with dedication and enthusiasm. Should the opportunity arise, I have little doubt that you may well be called upon again to provide the Group with your expertise.
Ex head of legal

Thank you so much for your consummate performance in the [hot] tub. I imagine [other expert] is still trying to get the soap out of his eyes.
Partner

I can’t thank [your team] enough for the excellent work they did on this case in very trying circumstances.
Lead QC

This is a great result – thank you all for your hard work, and for [partner’s] excellent performance when giving evidence at the hearing.

Conflict free expertise in accounting and financial matters