West Ham United co-owner David Sullivan has stepped down from his position as joint chairman and director of the club with immediate effect "having been made aware of the impending publication of serious historic allegations".

Sullivan has denied any "illegal conduct" and the Hammers say he is leaving "in order to avoid disruption to the club while he addresses the matter privately".

Sullivan has been the club's largest single shareholder since the death of his business partner David Gold in January 2023, which left him with a 38.8% stake.

Sullivan and Gold became joint chairmen of West Ham when they completed their takeover of the club in January 2010.

"It is understood none of the allegations relate to West Ham United or any of its operations," said West Ham.

More to follow.