Baffled by English Muffins

I was preparing an English muffin for Sylvia the other day, and I peeled the two halves apart before popping each half into the toaster. How, I wondered, do the English pre-slice the muffins in such a way as to keep the two halves "glued" together until you rip them in twain? Razorwire followed by...a second round of baking with extra yeast to stick them together? 

Baffling.