Skip to content
City PM
  • Germany
  • France
  • Europe
  • Markets
  • Business
  • Opinion
  • DE
  • Germany
  • France
  • Europe
  • Markets
  • Business
  • Opinion
  • DE
Wednesday 23 July 2025 9:55 am  |  Updated:  Wednesday 23 July 2025 9:15 pm

City traders’ Libor rate-rigging criminal convictions quashed by Supreme Court

By: Maria Ward-Brennan

Professional Services Editor

Add as a preferred source on Google
Libor: Tom Hayes outside Supreme Court
Tom Hayes Photo credit: Jordan Pettitt/PA Wire

Former City traders convicted of the rate-rigging scandal have had their criminal charges overturned by the top UK court after years of fighting.

The Libor scandal involved the manipulation of the London Interbank Offered Rate by traders at major financial institutions. The 54-year-old benchmark borrowing rate was permanently retired by the City regulator back in October.

Former UBS and Citigroup trader Tom Hayes was found guilty in August 2015 of conspiracy to defraud by ‘rigging’ the Libor. He was sentenced to 11 years in prison and was released after five and a half years.

A former Barclays trader, Carlo Palombo, was found guilty in March 2019 of conspiracy to defraud by rigging the Euro Interbank Offered Rate (Euribor). Palombo served four years in prison.

Both Hayes and Palombo, along with others, were investigated by the Serious Fraud Office (SFO).

Play Video

In January 2022, the United States Court of Appeal for the Second Circuit reversed the conviction of two former US traders for fraud in the manipulation of Libor rates. The former traders contend that, in doing so, the US court adopted a different definition of Libor to that used by the English courts in their convictions.

The Criminal Cases Review Commission (CCRC) referred these cases to the Court of Appeal, after concluding there was a ‘real possibility’ that the court would find their convictions unsafe.

However, last March, the Court of Appeal justices upheld both convictions. The court also rejected their application to appeal to the Supreme Court, but certified their case.

Hayes and Palomo applied directly to the Supreme Court, which accepted their case, and the hearing took place back in March.

The top court had to consider two legal issues.

Firstly, whether a Libor or Euribor submission is automatically deemed dishonest if it is influenced by a trade made to profit from the movement.

Read more

Hacking scandal? Inside Prince Harry’s costly legal battle over privacy

Associated Newspapers, which is owned by Lord Rothermere's Daily Mail and General (DMG Media), said losses ballooned from £699,000 in 2022 to £44.5m in the year ended 1 October 2023

The second was whether a Libor or Euribor submission was the single cheapest rate at which the panel or prime bank could borrow at the time of the submissions, or whether it was a rate selected from within a range of potential borrowing rates.

Top court overturns convictions

Speaking at the Supreme Court today, Mr Justice Leggatt, said the top court allowed the appeal, agreed on by all the Justices, resulting in both convictions being quashed.

He explained that, at the time, the prosecution’s case alleged that defendants dishonestly agreed to submit false or misleading rates to create a trading advantage.

Hayes admitted to trying to influence submitters to put forward rates advantageous to his trading but denied agreeing to submit false rates.

At his trial, the judge’s instructions to the jury was that any consideration of commercial advantage made the rate submitted false or misleading were legally inaccurate and unfair.

However, the Supreme Court found that the judge’s directions effectively instructed the jury to find Hayes guilty of procuring false or misleading rates, which was a question of fact.

As such, Mr Justice Leggatt said Hayes, and Palombo, were deprived of a fair trial due to these legally inaccurate and unfair directions. The Supreme Court deemed the convictions to be unsafe and ordered them to be quashed.

Commenting on the ruling, Hayes said: “My faith in the criminal justice system at times was likely destroyed and it has been restored by the justices from the Supreme Court today and I think it’s only right that more criminal appeals should be heard at this level.”

His lawyer Karen Todner said: “What Tom [Hayes] and the other bankers have gone through is a horrendous miscarriage of justice.”

“There have been massive legal errors by both the Judges involved in the initial conviction and, I would say, the SFO and those who represented it. The case highlights numerous issues about our criminal justice system all of which I believe meet the criteria for a public inquiry,” she added.

A spokesperson for the SFO said: “We have considered this judgment and the full circumstances carefully and determined it would not be in the public interest for us to seek a retrial.”

Read more

10 years on from Brexit, traders shouldn’t forget the power of comms

Brexit Leave party gathering with attendees holding Union Jack flags, highlighting the political atmosphere post-Brexit.

Share this article

  • Facebook
  • X
  • LinkedIn
  • WhatsApp
  • Email

Similarly tagged content:

Sections

  • News

Categories

  • Business
  • Banking
  • Legal

People & Organisations

  • Libor
  • Supreme Court
  • Tom Hayes and Carlo Palombo
  • trading

Trending Articles

  • Exclusive: Big Four giant KPMG to cut more jobs

  • Music tycoon Simon Cowell sued by prominent City lawyer

  • The former African gold miner taking on the billionaire Issa brothers

  • Tesco ‘in talks’ to exit eastern Europe

  • As it happened: FTSE 100 slump as oil soars; Trump says Iran will be ‘hit hard’ tonight

More from City PM

  • Hacking scandal? Inside Prince Harry’s costly legal battle over privacy

    Media
    Associated Newspapers, which is owned by Lord Rothermere's Daily Mail and General (DMG Media), said losses ballooned from £699,000 in 2022 to £44.5m in the year ended 1 October 2023
  • 10 years on from Brexit, traders shouldn’t forget the power of comms

    Opinion
    Brexit Leave party gathering with attendees holding Union Jack flags, highlighting the political atmosphere post-Brexit.
  • Lightspeed Successfully Supports New Intraday Margin Trading Framework

    Business Wire
  • Trump blocked from sacking Fed official in landmark Supreme Court ruling

    Politics
  • Borrowing costs fall as interest rate hike fears ease

    Economics
    Keanu Reeves seen casually dressed during a public appearance in a local pub, engaging with fans and enjoying a relaxed at...
  • Former Bank of England rate-setter to become next OBR chair 

    Economics
    Jonathan Haskel speaking at a business conference, wearing a suit and tie with a focused expression, emphasizing economic ...
  • Ex-Lush chief’s lawyers hike costs to ensure their AI model isn’t trained by juniors

    Legal
    Law firms are increasingly deploying AI
  • Burnham must walk a tightrope on his ascent to Downing Street

    Politics
    Andy Burnham discussing new policy agenda at a press conference with backdrop of city skyline and audience in attendance.

City PM — European politics, business and analysis.

Europe

  • Germany
  • France
  • Europe
  • UK & Ireland

Topics

  • Business
  • Markets
  • AI
  • Technology
  • Opinion
  • Energy

More

  • Politics
  • Economics
  • Fintech
  • Legal
  • Sport
  • Life

Company

  • About City PM
  • Editorial Policy
  • Corrections
  • Contact
  • Terms of Use
  • Privacy Policy
  • Cookie Policy
© 2026 City PM · Published by CityPM Media, Bahnhofstrasse 65, 8001 Zürich, Switzerland
About · Editorial Policy · Corrections · Contact · Privacy · Facebook