About McDonald's Queen Elizabeth Square Chelmsford. Since 1974, McDonald's has been dedicated to serving quality food and quick service, at an affordable price for our customers. Visit McDonald's Queen Elizabeth Square Chelmsford and choose from a menu of favourites, including McCafé® coffee, tasty breakfasts, delicious burgers like our Quarter Pounder®* with Cheese, McPlant, and more! Before you head out, check out the latest offers and order your food ahead on MyMcDonald’s app. Next time you’re looking for a treat, head to McDonald's Queen Elizabeth Square Chelmsford . We look forward to serving you!