Add the Worcestershire sauce, A1 Steak Sauce, cream, and a pinch of salt. Whisk until the mixture is well blended and creamy. Taste and adjust salt if necessary. If you prefer a more mustard bite, whisk in ½ a teaspoon more of the dry mustard until well blended. Cover and chill the mustard sauce until ready to serve.
2 teaspoons Worcestershire Sauce, 1 teaspoon A-1 Steak Sauce, 2 tablespoons light cream, Salt, to taste