One-pot chicken & bacon stew

INGREDIENTS

• 3 tbsp olive oil
• 16 chicken pieces on the bone (about 3kg/6lb 8oz in total)
• 140g smoked bacon , chopped or lardons or cubetti di pancetta
• 4 medium carrots , thickly sliced
• 2 onions , roughly chopped
• 2 tbsp plain flour
• 1 tbsp tomato purée
• 75ml white wine or cider vinegar
• 1l chicken stock
• 2 bay leaves
• 4 tbsp double cream or crème fraîche
• 600g small new potatoes , halved
• 12 large white mushrooms , quartered
• chopped herbs, such as parsley , tarragon or chives