Beef & beer pie

INGREDIENTS

• 1 onion , chopped
• 1 small celery stick, chopped
• 2 tbsp butter
• 2 tbsp plain flour
• 700g beef shin, featherblade or stewing steak, cut into large chunks
• 1 tbsp Worcestershire sauce
• 2 beef stock cubes
• 2 sprigs thyme
• 540ml can dark ale or beer
• 1 egg , beaten
• a few pinches poppy seeds
• 500g plain flour , plus a little extra
• 250g vegetarian suet