Train drivers' union ASLEF could cut its historic ties with the Labour Party amid furious rows between Sir Keir Starmer and the Left.
The Mirror understands ASLEF's conference in May will debate a motion for the union to disaffiliate from Labour in a move which would dramatically end a relationship stretching back almost 120 years.
The news comes as a bitter dispute plays out between the Labour Leader and Unite General Secretary Sharon Graham over the party's refusal to back bin workers in Coventry on strike over pay.
