Nicholas Hildyard of human rights group the Corner House welcomed the verdict. He said: "The UK talks about corruption but has never prosecuted a firm for bribing officials abroad. Lesotho has acted where others have only talked."
In June Building revealed Lesotho's director of public prosecutions' plans to prosecute British firms Balfour Beatty, Kier International and Jacobs Gibb for bribery on the same project. The firms deny any wrongdoing.