ITALIAN-STYLE SAUSAGE PASTA

4 gourmet pork sausages with black pepper and nutmeg • 1 tbsp olive oil • 1 tsp dried red chilli flakes • 2 garlic cloves, crushed • 1 tsp fennel seeds • 500ml hot chicken stock • 150g linguine • 4 tbsp Cirio Supercirio Double Concentrated Tomato Purée • 16 Waitrose & Partners Cherry Vine Tomatoes, halved • 50ml double cream • 50g pecorino, finely grated, plus extra shavings, to serve • ½ x 25g pack basil, leaves only