Melt butter in a medium nonstick skillet over medium heat; add celery and onion, and sauté 7 minutes or just until tender. Let cool.
Meanwhile, in a large bowl stir together ground beef, 2 eggs~lightly beaten,1/2 can of tomato sauce. 1 tablespoon Worcestershire sauce, breadcrumbs, celery mixture,and next ingredients. Shape into a 10- x 5-inch loaf, cut bacon in half, and put on top of loaf. Bake at 350°for 45 minutes.
Stir together remaining 1 tablespoon Worcestershire sauce, tomato sauce, and 1 tablespoon ketchup until blended, pour evenly over meatloaf, and bake 15 to 20 more minutes, or until no longer pink in center. Let stand 10 minutes before serving.