Identical twin brothers hope they have ticked the right boxes and bought the right flavors for their new Cereal Killer Cafe in London, serving only cereal.

Alan and Gary Keery, from Belfast, offer 120 cereals from around the world at the cafe, which they say is the first of its kind in London, along with 20 toppings and 30 types of milk. It opened Wednesday.

"We thought, 'Well, why isn't there anywhere that you can just go and sit down and have a bowl of cereal?' " Gary Keery said. "So we have done some research into it. Would it work as a business? How would it look? Where would we get the cereal from?