About the Double Chicken Royale
The Burger King Double Chicken Royale has no price published by Burger King in its restaurant data and carries 792 kcal. Two golden, crispy Chicken Royale patties made with 100% chicken breast topped with iceberg lettuce, creamy mayo and crowned with a toasted sesame seed bun. It sits in the chicken section of the UK menu, alongside 12 other items.
The nutrition panel shows 38g of protein, which is 76 percent of a day's reference intake, 41g of fat, 3.9g of it saturated, 3.7g of salt, 62 percent of the 6g daily maximum, 6.3g of sugar. Of everything declared, salt is the number that constrains the rest of the day rather than the calorie count.
Divide 792 kcal by its 312g and you get around 254 kcal per 100g. That makes it typical of the menu around it, so weight and satisfaction track each other here.
On calories it lands 203 kcal above the chicken average of 589 kcal. For comparison, BBQ Steakhouse Angus comes to 792 kcal, which is the nearest match anywhere on the menu.
Nothing is declared as an ingredient here. What Burger King flags instead is 8 allergens the Double Chicken Royale may pick up in a shared kitchen: gluten, wheat, milk, egg, soya, sesame, celery, mustard. The gap between the two lists is the part that matters: one describes the recipe, the other describes the kitchen it is made in. Of the 12 items in this section with an allergen declaration, 3 flag fewer than this one. The declaration is the brand's, made against the fourteen allergens UK law names, and it stops at the recipe. The branch is the part you have to ask about.
Put beside the rest of an order, Bacon Caesar Crispy Chicken at £8.09 and Chicken Royale Bacon & Cheese at £7.39 sit in the same section and are the obvious companions. Whether that lands where you want it is a question for the calorie calculator; the full menu has the rest of the prices.