In England, "baked potato" and "jacket potato" are terms used to describe the same dish, which is a potato that is cooked in its skin until it becomes soft and fluffy on the inside. The terms are often used interchangeably, and both refer to a potato that is typically cooked in the oven.
The term "baked potato" is more commonly used in North America, while in the UK, the potato is commonly referred to as a "jacket potato." The name "jacket potato" comes from the fact that the skin of the potato becomes crispy during the baking process, resembling a jacket.
To prepare a jacket potato, you would typically scrub the potato clean, pierce it with a fork a few times to allow steam to escape, and then bake it in the oven until the skin is crispy and the interior is soft and fluffy. After baking, the potato is often sliced open, and various toppings such as butter, cheese, sour cream, baked beans, coleslaw, or chili can be added to enhance its flavor.
In summary, "baked potato" and "jacket potato" both refer to the same dish: a potato baked in its skin until tender, but in the UK, it is more commonly known as a "jacket potato."