These are the ribs I get at Tesco. Look for the strips that are meaty, remove the distorted bones on the ends and save for a soup if you wish, and just go with the nice straight bones. The bones are only about 3 inches long.
Remove silver skin from the back of the ribs if that is present. Cut the ribs into 3 bone sections, sprinkle generously with salt and pepper and place in the slow cooker.
Pour the root beer into the slow cooker, cover, and cook on Low setting for 5 hours, do not remove the cover.
Check the ribs at 5 hours, if very tender, you are almost done, if not tender, continue cooking and checking each hour. Once the ribs are tender, carefully remove from the pot and set on a foil lined baking sheet.
Brush the ribs with BBQ sauce and broil for a few minutes, charring a bit is ok, then flip the ribs over, brush more sauce, and broil for a few more minutes, again, a bit of char is ok. Remove to a serving tray, sprinkle some thinly sliced spring onion on, and serve.