Ajas - as many pp have pointed out, what you call bacon irish people call rashers. And op is referring to the plural as in ‘rashers’ rather than ‘a rasher’.
In ireland ‘bacon’ is a bigger piece of meat that is usually boiled. And yes, we do know that rashers are sliced bacon.
When I lived in the U.K. I found it really strange to hear people refer to ‘rashers of bacon’, I used to think what else would a rasher be?!