Preheat the oven to 180C/Gas Mark 4. 1) Scrub the potatoes and pat dry. Rub the skin with vegetable oil. Sprinkle with salt. Pierce the skin of the potato in several places with the tines of a fork. Place on a cookie sheet and bake for 1 hour and 15 minutes, until the sides are soft when pressed.
2) Place in a chafing dish and serve with bowls of butter, sour cream, grated Cheddar cheese, and crumbled streaky bacon for toppings.