I had this conundrum during the first lockdown when supplies were short. Local shop only had polish flour. Even my polish friend struggled to explain it. Closest we could work out was that out of the two types, one was better for cakes and the other for bread, but didn't exactly compare to self-raising vs plain.
We have the same in China, there's bread flour, cake flour and steamed bun flour. No self-raising flour. As I type this, I am remembering that you are from NI and I hope you pronounce "flour" like Nadine from Girls Aloud.
I had this conundrum during the first lockdown when supplies were short. Local shop only had polish flour. Even my polish friend struggled to explain it. Closest we could work out was that out of the two types, one was better for cakes and the other for bread, but didn't exactly compare to self-raising vs plain.