Don't order an English Muffin in England, as you will likely get a funny look: Like the "French" in "French fries," the "English" in "English muffin" is just a North American moniker, mostly assigned to distinguish the bearer of said moniker from traditional, North American-style muffins. (You know, the kind that come sitting in little paper wrappers...and are often quite sweet.)
TJ's Classic English Muffins are not sweet muffins - if anything, they're a bit savoury. Technically speaking, they're soft, slightly spongy (picture a sourdough-like texture), puck-shaped pieces of bread, horizontally bisected into two, equal, circular halves.
Each Muffin has a toothsome exterior (more of a "skin" than a "crust," though), and an interior filled with plenty of...well, least we infringe upon on any trademarks, we'll say they're filled with plenty of "pockets & crevices." Yes, that's it. Pockets & crevices...