'Irish beef' here refers to the country of origin. This is a hangover from the BSE crisis, when people became very edgy about British beef. Restaurants nearly always say where beef came from ever since.
That's probably true, but it's also very common to see for example "British [meat]" or "German [meat]" marketed in their respective countries these days, not just beef.
Paradoxically, British beef producers and their marketing board doubled down and made a virtue of Britishness, which seemed brave at the time, but was based on confidence -- and building confidence -- in the inspection and control regimes.
Frankly I think that confidence has been repaid over the long term, but at the same time I have only eaten beef or lamb a handful of times a year since the late nineties, even though whatever risk I carry of some future diagnosis is entirely to do with having been alive and eaten beef before 1989!
'Irish beef' here refers to the country of origin. This is a hangover from the BSE crisis, when people became very edgy about British beef. Restaurants nearly always say where beef came from ever since.