Gordon Ramsay is facing claims that a Muslim worker at his premier restaurant was the victim of racist abuse by staff…Tama Siby, 26, says he was called a "black donkey" by a staff member and victimised because of his religion. He is taking [Mr Ramsay] to tribunal, demanding more than £50,000 for unfair dismissal...Mr Ramsay is not personally accused…Mr Siby alleges racial harassment, racial discrimination, religious discrimination and victimisation...A friend [of Mr Ramsay] said last night: "Gordon...would never tolerate racism and will deny this was ever said."