Remove the meat from the bone, trim off all the fat and cut into cubes. Keep the bones, place the meat in a pot, cover with cold salted water. Bring to the boil, drain and rinse the lamb.
In a fresh pot put the meat, bones, bouquet of herbs, onions, seasoning, carrots, leeks and turnip and cover with water. Simmer gently for one hour. Skim off the foam as it rises. (this is very important for the final flavour and appearance of the stew.) Add the potatoes and continue cooking for 25 minutes. For the last 5 minutes add in the cabbage. When the meat and vegetables are cooked remove the bones and bouquet of herbs. Stir in the chopped parsley and a dash of Worcester sauce.