In a small bowl, mix together mayo, sour cream, vinegar, sugar, dijon, Worcestershire, salt, and pepper.
In a large trifle bowl or glass dish, begin layering the ingredients: lettuce first, then pasta, peppers, red onions, peas, celery, ham, olives, dressing, and cheese.
Cover tightly and refrigerate for at least 5 hours.
Toss right before serving.
