Stir the beef, vegetable soup, 1/2 can mushroom soup and Worcestershire in a 3-quart shallow baking dish.
Heat the remaining soup, water and butter in a 2-quart saucepan over medium-high heat to a boil. Remove the saucepan from the heat. Stir in the milk. Slowly stir in the potatoes. Spoon the potatoes over the beef mixture.
Bake at 400°F. for 20 minutes or until the potatoes are lightly browned.
