SMOKY SEAFOOD PAELLA

2 tbsp olive oil 80g chorizo, sliced 1 onion, finely chopped 2 cloves garlic, finely sliced 2 Romano peppers, chopped 1 tbsp smoked sweet paprika 1 tbsp tomato purée 250g Waitrose Bomba Paella Rice 800ml chicken stock 180g pack raw Waitrose Extra Large King Prawns 2 x 200g packs Waitrose Scottish Mussels 25g pack flat leaf parsley, leaves roughly chopped