Many people think that an Ulster Fry is the full cooked breakfast with potato farls and soda bread, e.g., Ulster Fry
In Liverpool, Ulster Fry is a meat product that is like a thinly-sliced not-chorizo with red rind in larger, non-circular form and it's typically purchased from a supermarket deli (along with liver sausage which should be fried as part of a mixed grill along with black pudding etc.). The only place that I know that sell it don't have a photograph: Blood's Ulster Fry (Lockwood's of Liverpool mention it but, again, no photograph. You'd think it's a regional shame or something.)
Some people offer tinned bacon fry as a substitute for Ulster Fry. They are to be pitied yet abjured.