THE UK’S LARGEST credit card issuer Barclaycard is offering a special deal to 200,000 potential customers in a bid to lure them from rival card companies. Borrowers who transfer their accounts to Barclaycard will pay only 9.9% interest, half its standard rate of 18.9%. The decision to make this offer was in part prompted by consumer groups and others who have accused credit card companies of inflating interest rates to boost profits. Probably a more important factor, however, is the increased competition from new players in the marketplace, particularly US incomers offering introductory rates as low as 6.9%.