Shin of beef and oxtail stew

2 whole oxtails

450g shin of beef or stewing beef, cut into 4cm (1½ inch) cubes

110g streaky bacon

30g beef dripping or 2 tablespoons olive oil

225g onion, finely chopped  

225g carrots, cut into 2cm (¾ inch) cubes

55g celery, chopped 

1 tbsp tomato purée

1 bay leaf

1 sprig of thyme and parsley stalks

salt 

pepper

150ml red wine

450ml homemade beef stock or 600ml all beef stock

170g mushrooms, sliced

15g roux

2 tbsp parsley, chopped