Using a serrated knife, cut the top off the cob loaf (approximately 5 cm / 2 inches). The top then becomes the 'lid'. Scoop out pieces of the inside of the loaf until it is completely hollowed out.
Place the cream cheese, sour cream, cream, grated cheeses, spring onions and cooked bacon into a large bowl. Mix to combine.
Place the hollowed cob loaf onto a flat baking tray. Place the bread pieces around the cob loaf. Spoon the bacon cheese dip mixture into the hollowed loaf.
Place the 'lid' on top. Bake for 30 minutes or until the creamy dip is warm and gooey and the bread pieces are crunchy.