Set oven control at broil and/or 550 degrees F. Cut English muffins into halves and spread cut sides with butter. Cut bacon slices in halves. Place muffin halves and bacon slices on rack in broiler pan. Broil with tops of muffins 3 inches from heat until bacon is light brown, about 2 minutes. Remove muffins and turn bacon over. Broil bacon 1 minute longer. Top each muffin half with 1 slice tomato, 2 pieces bacon and 1 slices cheese. Return muffins to broiler for 1 minute or until cheese is melted. Serves 6.