Any good grocery store. Tesco sell it.
You may have not meant the question in the above sense; the best strong plain flour is Canadian. "Strong" implies high gluten content, which varies accoring to what variety of wheat is being grown. English and French wheat is fairly soft, Canadian as strong, I think Italian is fairly strong also ("00" flour for pasta making has a high gluten content but is not suitable for breadmaking)
yes
That is 2.9 cups of flour
If you were baking a cake: Self-Raising Flour - would make it rise Plain Flour - wouldn't make it rise People use self-raising in cakes to make them bigger, but they use plain in pancakes so it keeps it thin.
There is no difference between plain flour and all-purpose flour. They are one and the same. All-purpose (plain) flour does not contain the salt and baking soda that self-rising flour has.
which is the best flour to make bread out of strong plain flour self rasing flour or plain flour
yes. They are the same thing. Plain flour is an Australian term where all-purpose is the American.
No
No
It is best to use self-raising flour if the recipe asks for it, as it is not the same as plain flour, but you can substitute plain flour for self-raising flour provided you add raising agents like baking powder and bicarbonate of soda yourself to the flour.
AP Flour = All Purpose Flour = Plain Flour
Plain flour most likely is AP flour and I say yes at any rate.
All-purpose flour is the same thing as plain flour. The terms are simply different for different parts of the world. In Australia and the United Kingdom, it is known as plain flour while in the United States and Canada it is known as All-Purpose Flour. This type of flour has a lower amount of gluten protein than bread flour, but more than baking flour so it is balanced and can be used for a wide range of purposes.