Brussels Sprouts Soup

Ingredients

• butter - 25 g (1 oz)
  1 unit
• onion - 1 chopped
  1 unit
• bacon - 3 rashers diced
  1 unit
• celery - 3 sticks sliced
  1 unit
• Brussels sprouts - 450 g (1 lb) halved
  1 unit
• potatoes - 225 g (8 oz) diced
  1 unit
• chicken stock - 1 litre (1* pints)
  1 unit
• milk - 300 ml
  1 unit
• salt and freshly ground black pepper
  1 unit
• double cream - 4 tbsp.
  1 unit