LL Flooring - previously known as Lumber Liquidators - is shutting all its stores after going out of business after three decades. The retailer, one of America's biggest flooring suppliers, was looking for a buyer after filing for bankruptcy. Earlier in the summer it had 442 stores, but shut nearly 100 as it looked to cut costs and woo investors. No buyer could be found. In a letter to customers yesterday, bosses said: 'It is with a heavy heart that we must let you know that we are going to begin the process of winding down the business and closing...