<p><br /> Network Rail has been granted an injunction preventing a crippling national strike by signal workers.<br /> </p><p><br /> Judge Mrs Justice Sharp made an interim order against the Rail Maritime and Transport union at a hearing in London's High Court.<br /> </p><p><br /> Earlier, a QC representing Network Rail told her that "unlawful" strike action would cause "immense damage to the economy".<br /> </p><p><br /> The union, which has called four days of action from next Tuesday, the day after the Easter break, strongly contested the legal move.<br /> </p><p><br /> Bob Crow, general secretary of the RMT, said: "This judgment is an attack on the whole trade union movement and twists the anti-union laws even further in favour of the bosses.<br /> </p><p><br /> "Workers fighting for the principle of a safe railway have had the whole weight of the law thrown against them. Our executive will meet this evening with a recommendation for a re-ballot."<br /> </p>
