Spaniard Moutaz Almallah Dabas, who was arrested in Britain for his alleged links to the Madrid bombing, on Wednesday lost his last bid to avoid extradition to Spain for trial. Five judges of the House of Lords rejected an appeal lodged by the Syrian-born Dabas, brother of Mouhannad Almallah Dabas, one of the 29 people currently on trial in Spain for their alleged roles in the March, 2004 attacks.The nearly simultaneous backpack-bomb explosions on four rush-hour commuter trains killed 191 people and wounded nearly 2,000 others in the worst terrorist attack in Spanish history. Prosecutors contend that those who carried out the massacre did so as an act of "holy war" terrorism motivated by radical Islamic fundamentalism. The Chamber of Lords, which constitutes the highest court in Britain, rejected arguments by attorneys for Dabas that he might be subjected to cruel conditions or even torture in Spain if extradited. Dabas was arrested in March, 2005 in Slough, west London, on a warrant issued by Spanish Judge Juan del Olmo. The alleged terrorist collaborator previously had lost a bid in London's High Court to block extradition after a British magistrate had ruled that he should be sent to Madrid for trial. Spanish prosecutors say the Dabas brothers conspired with several of those implicated in the massacre.