UK telecoms group Cable & Wireless Worldwide yesterday issued its second profit warning in less than a year, reports Dow Jones Newswires, triggering a 15 percent plunge in its share price. In a surprise pre-close trading update for fiscal 2011, the firm forecast that its EBITDA would be flat in fiscal 2012 from a year earlier due to pricing pressure on data contract renewals, accelerating declines in legacy voice services, a one-off rebate it got in 2011 and some inflationary pressures.