English Muffins are just called Muffins in the UK, but then so are American Muffins, so citizens tend to distinguish on the basis of visuals. Muffins traditionally come in wholemeal and white form, with upclass supermarkets creating various spiced muffins, or muffins with raisins/sundried tomato/stuff contained in the dough. All go wonderfully with butter, and work well as a more indulgent substitute to toast.

I'm not sure if American Muffins are made differently here than in the US, but that kind of muffin in this country is invariably a super-dense lump of chocolate-chipped mass, which no human can eat in one sitting.