Combine English cheddar cheese, blue cheese, and cream cheese in a large bowl.

Add grated onion and Worcestershire sauce to the cheese mixture.

Mix all ingredients thoroughly with your hands until well combined.

Cover the bowl and chill the mixture in the refrigerator for at least 30 minutes to allow it to firm up.

Remove the chilled cheese mixture from the refrigerator.

Shape the cheese mixture into a ball.

If desired, finely mince walnuts and roll the cheese ball in the minced walnuts to coat it completely.

Alternatively, store the cheese ball in a crock without nuts.

Serve the cheese ball with onion melba rounds or crackers.