Combine Worcestershire sauce, lemon zest, wine and lemon juice in a skillet. Bring to a boil, and reduce liquid to ¼ cup. Add butter, stirring constantly until slightly thickened. Add salt and pepper to taste.
Place fish in baking dish. Drizzle with olive oil and sprinkle with salt and pepper. Broil fish for 3 to 5 minutes. Remove from broiler; garnish with lemon slices, and pour sauce over fish. Broil for another minute or until sauce bubbles and fish begins to flake.
Garnish with parsley. Remove from pan, and serve.