The main differences between English muffins and crumpets are that English muffins have a thicker batter, rise higher, are cooked both sides, and are typically split before toasting. The flavor is similar, though not identical. If you don't have English muffin/crumpet rings, you can make them from tuna cans or similar-sized cans, well-washed and dried. The recipe comes from King Arthur Flour. Times are estimated; prep time includes rising and cook time is estimated for 4 batches of English muffins (will take less time for crumpets or for fewer cooking batches).