Chigs' Chicken, Leek & Mushroom 'Clock' Pies recipe - The Great British Bake Off

Ingredients

• 5 tbsp olive oil
• 30g unsalted butter
• 300g skinless, boneless chicken thighs, diced
• 100g pancetta lardons
• 1 large leek, sliced
• 2 spring onion, finely sliced
• 1 garlic clove, crushed
• 4 chestnut mushrooms, sliced
• 2 tbsp plain flour
• 150ml chicken stock
• 1 tbsp crème fraîche
• 2 tarragon sprigs, leaves picked and finely chopped
• 1 thyme sprig, leaves picked and finely chopped
• salt and freshly ground black pepper
• 500g plain flour, plus extra for dusting
• 250g unsalted butter, chilled and cubed
• 2 pinches of salt
• 1 egg, lightly beaten