In a long-running legal battle between former rugby players and the sport’s governing bodies, a High Court judge in London has refused to block mandatory disclosure of medical records in what could prove to be a pivotal ruling for concussion litigation in Britain.
In a landmark decision issued on December 23, 2025, High Court Justice Dexter Dias dismissed an appeal brought by more than 1,100 former professional and amateur rugby union and rugby league players who claim they suffered severe brain injuries during their playing careers. The ruling upheld earlier case management orders requiring claimants to disclose historical medical records and neurological testing results as part of the litigation process.
Justice Dias concluded that the disclosure requirements were both relevant and proportionate given the scale and seriousness of the claims. The decision reinforces earlier orders issued in February 2024 and February 2025, which warned that individual claims could ultimately be struck if disclosure obligations were not met.
The lawsuit targets several of rugby’s most prominent governing bodies, including World Rugby, the Rugby Football Union, the Welsh Rugby Union, and the Rugby Football League.
The players allege that repeated concussive and sub-concussive impacts during their careers led to serious neurological conditions, including early-onset dementia, Parkinson’s disease, motor neurone disease, epilepsy, and chronic traumatic encephalopathy (CTE). They contend that rugby’s governing bodies knew—or should have known—about the long-term risks associated with repeated head impacts but failed to take adequate steps to protect players. All defendants deny liability.
During the appeal hearing, the players’ counsel, Susan Rodway KC, argued that the disclosure requirements were “impossible, onerous and costly,” particularly given the advanced age of many claimants and the difficulty of retrieving decades-old medical records. She described the order as both paternalistic and irrational.
Justice Dias rejected those arguments, writing that the disclosure process had been “misunderstood and exaggerated” by the claimants’ legal team. The orders were “not disproportionate, oppressive, irrational or legally perverse,” he wrote, noting that where records no longer exist, claimants may simply confirm that no further documentation is available.
The judge also expressed concern about what he described as a “serious erosion of the court’s confidence” in how disclosure had been handled over the past year. Effective and fair disclosure, he emphasized, is essential because the litigation will proceed through a limited number of lead—or “bellwether”—cases that could shape the outcome of hundreds of related claims.
“An erroneous inclusion of a claimant or claimants in the lead cohorts may affect many other claims wrongly, unhelpfully or unfairly,” Dias wrote.
The law firm Rylands Garth, which represents the players, said it welcomed the court’s clarification and reaffirmed its commitment to complying with disclosure obligations.
Rugby’s governing bodies responded in a measured tone. In a joint statement, World Rugby, the RFU and the WRU said the ruling highlighted that “many players in this case are at risk of having their claims struck out” if disclosure obligations are not fulfilled.
“Player welfare is rugby’s number one priority,” the organizations said.
The Rugby Football League similarly reiterated its “long-standing and unwavering commitment to player safety and welfare,” pointing to what it described as science-based improvements in concussion management, education, and prevention.
The lawsuit includes several high-profile former internationals, including members of England’s 2003 Rugby World Cup–winning team such as Steve Thompson, Mark Regan, and Phil Vickery. Former Welsh internationals Gavin Henson, Colin Charvis, and Ryan Jones are also among the claimants.
Outside the courtroom, the case has attracted additional scrutiny. Rylands Garth is currently under investigation by the Solicitors Regulation Authority following allegations by former England prop Will Green that he was pressured to join the lawsuit despite receiving an independent medical diagnosis indicating no brain injury. The firm has denied the allegations.
Justice Dias’ ruling does not resolve the core legal questions of liability or causation. Instead, it clears a significant procedural hurdle in litigation that could reshape how historical concussion claims in rugby—and potentially other contact sports—are evaluated.
The High Court will now move forward with selecting lead cases and setting a timetable for key hearings.
For the former players involved, many of whom say they continue to suffer cognitive and physical decline, the litigation represents a critical effort to obtain accountability and recognition of the long-term consequences of head injuries in professional sport.
The case was scheduled to return to court later this month.
