Beef and oxtail stew

2 whole oxtails

450g (1lb) shin of beef or stewing beef, cut into 4cm (1 1/2 inch) cubes

110g (4oz) streaky bacon

25g (1oz) beef dripping or 2 tablespoons olive oil

225g (8oz) finely chopped onion

225g (8oz) carrots, cut into 2cm (3/4 inch) cubes

55g (generous 2oz) chopped celery

1 tbsp homemade tomato purée

1 bay leaf, 1 sprig of thyme and parsley stalks

salt and freshly ground pepper

150ml (5fl oz) red wine

450ml (16fl oz) homemade beef stock or 600ml (1 pint) all beef stock

175g (6oz) mushrooms (sliced)

15g (generous 1/2oz) roux

2 tbsp chopped parsley