Chill glasses in refrigerator one half hour before serving.
Mix horseradish powder with 1 tsp. water to form a thick paste. Set aside to allow natural heat to develop. Working with two pitchers, mix tomato powder with cold water in one pitcher and whisk until thoroughly blended. In the same pitcher add pepper, 1½ tsp. Cambridgeshire Celery Seasoning and juice from 2 wedges of lime. Add remaining ingredients, including horseradish paste. Pour from pitcher to pitcher until thoroughly blended. Add salt and pepper to taste and adjust any other seasonings to taste.
Rim chilled glasses with remaining Cambridgeshire Celery Seasoning. Fill 2/3 with ice, just less than half way with vodka or gin, top off with Bloody Mary mix and stir. Garnish with spears of olives, cheese cubes, cooked sausage slices and remaining lime wedges.