About McDonald's. Since 1974, McDonald's has been dedicated to serving quality food and quick service, at an affordable price for our customers. Visit 48 Leicester Square City Of Westminster London 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.