Two companies were ejected last night from Britain's biggest arms fair for promoting leg irons for prisoners and battlefield captors. BCB International, a British-based firm, and Famous Glory Holding, a Chinese company, were thrown out of the biennial Defence Systems and Equipment show...The two companies were told to leave, allegedly for breach of contract, by Reed Elsevier, organisers of the fair... Last night BCB denied selling leg irons...A representative of Famous Glory Holding made no comment.