Leek and potato soup

My mum has made this soup for as long as I can remember. We all ate it as children and now our children eat it when they go to her house. It is our family soup; it is the soup we eat with cold meat and jacket potatoes; it is the soup we eat in the evening after a big lunch; it is the soup that I can smell cooking in my mind when I think of her kitchen; it is the smell of home. I never change the recipe because to me it is perfect.