Rustic Lamb & Beef Aussie Pies with Herb‑Crisp Crust

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1 tablespoon Worcestershire sauce

1 teaspoon dried thyme

½ teaspoon dried rosemary

Salt & pepper, to taste

1 cup beef stock

2 tablespoons flour (for thickening)

1 tablespoon butter

1 sheet puff pastry (or shortcrust for top), thawed