cut the top fourth off the loaf of bread; carefully hollow out the bottom, leaving a 1 inch shell. Cut the removed bread and top of loaf into cubes. Set aside.
In a large bowl, beat cream cheese until fluffy. Add the sour cream, cheddar cheese, and Worcestershire sauce until blended. Stir in bacon and onions.
Spoon into bread shell. Wrap in a piece of heavy duty foil, about 24" x 17". Bake at 325° for one hour or until heated through. Serve with crackers and reserved bread cubes. The rich spread bakes right in the bread bowl and goes well with almost any deeper. Plus, cleanup is a breeze.