Raised pork and egg pie

Name: Raised pork and egg pie
Ingredients: 300g/10½oz good-quality sausages, such as Lincolnshire, skins removed; 300g/10½oz pork mince; 150g/5½oz cooked ham hock, cut into roughly 1.5cm/½in pieces; 2 banana shallots, finely chopped; 3 tbsp chopped fresh parsley; 4 hard-boiled eggs, shelled; salt and white pepper; 450g/1lb plain flour, plus extra for dusting; 100g/3½oz strong white flour; 75g/2½oz unsalted butter, chilled and cut into 1cm/½in cubes; ½ tsp salt; 100g/3½oz lard, plus extra for greasing; 1 free-range egg yolk, beaten