In a statement, which pointedly does not thank Brady for her time at the club, the FAB said: “The Fan Advisory Board notes the departure of Karren Brady from West Ham United.

“Her time at the club will not be judged by corporate messaging, but by the lived experience of supporters. On that measure, her legacy is deeply damaging.

“Under her leadership, supporters have seen:

Concessions stripped from young, elderly and disabled fans only to be restored after a season-long campaign by all supportersTicket prices rise year-on-year despite record broadcast revenuesA widening disconnect between the club and its fanbaseOngoing failures in stadium operations, safety and supporter experienceA consistent refusal to provide transparency on key issues, including attendance and governanceA record financial loss of £104m and another one on the way for this season. The club are now in a worse financial situation than they were when Mr Gold and Mr Sullivan bought the club in 2010.”

Addressing the stadium move in particular, the FAB added: “The move to the London Stadium was sold as progress. We were told ‘we had no choice, we had to move in order to compete’.

“For many, it has delivered the opposite – a dilution of identity, atmosphere and belonging.

“The FAB has engaged throughout in good faith, offering clear, evidence-based solutions. These have too often been met with delay, deflection, or outright refusal.

“Stewardship demands accountability. Many supporters will conclude that, in this respect, the club’s leadership has fallen short.”

Brady’s departure leaves West Ham in the hands of joint chairmen Daniel Kretinsky and David Sullivan. The FAB said: “This must now be a turning point – not a rebrand. Deep leadership issues remain at the club however.

“West Ham United needs leadership that respects supporters as stakeholders, restores transparency, and rebuilds trust through action, not words.

“The damage done to the club’s relationship with its supporters is deep and it is serious. It cannot be ignored. It must now be repaired or else our club will have lost its identity and culture, the very things that made us West Ham United.”

Brady, 57, had been in the role for 16 years and became a key power broker in English football, having led the club’s move from Upton Park to the London Stadium in 2016.

It is understood that she made the decision to leave at the turn of the year.

West Ham enjoyed success in Europe during Brady’s tenure, winning the Europa Conference League in 2023. She also oversaw the £105m transfer of Declan Rice to Arsenal that summer.