Macaroni cheese with crunchy breadcrumbs and bacon

Name: Macaroni cheese recipe with crunchy breadcrumbs and bacon
Prep time: 25 mins
Cook time: 25 mins
Yield: Serves 4
Ingredients: 400g (13oz) dried macaroni; 1.5l (48fl oz) milk; 1 bay leaf; 75g (2.5 oz) butter; 4tbsp plain flour; 250g (8oz) grated mature cheddar cheese; 50g (13/4oz) freshly grated parmesan cheese; 2tsp Dijon mustard; 3-4tbsp grated parmesan cheese for topping; 3 rashers streaky bacon, chopped; 60g (2oz) fresh breadcrumbs