I have Delia's Summer book. Thought I would try the hot and sour pickled prawns. I have had them pickling for 3 days now and just checked that they should be raw when pickled (nothing indicates that they should be cooked). Someone else asked the same question and you answered that they should be cooked. Why doesn't it say this in the recipe? It may seem obvious to an expert but the average reader is guided by the recipe, which mentions peeling and dethreading them. Dethreading the black waste matter is usually done when the prawns are raw - hence my assumption that they should be raw. Now I appear to have wasted time and resources on prawns that can't be eaten. Or can they? Please advise.