If you have or can get ANY flour, a recipe from Good Housekeeping sounds easy. I added the alternatives in brackets
Soda Bread
Ingredients
500g wholemeal flour (white plain? Maybe SR but omit the bicab? Fancy grains?)
2 tsp sea salt
1 tsp bicarbonate of soda
1 tbsp (optional) finely chopped rosemary (or any herb or spice?)
400ml whole milk (skimmed milk?, reconstituted dried milk, diluted evaporated? yoghurt?)
1 lemon, juiced (bottled lemon juice? vinegar?)
2 tsp honey (sugar?)
Method
1. Heat oven to 200C/180C fan/gas 6. Mix together the flour, salt and bicarb in a bowl. And if you’d like rosemary bread, add the chopped rosemary too.
2. Mix together the milk and lemon juice in a jug, and wait for a minute as it magically turns into buttermilk. Then stir in the honey, and simply pour it into the flour mixture. Stir it with a knife for a minute until the whole thing comes together into a sticky dough.
3. Tip onto a floured work surface and shape it into a ball.
4. Put the ball on a floured baking tray and, using a sharp knife, make a deep cross on top.
5. Put in the oven and bake for 40 mins.
6. Cool on a wire rack until warm, then slice and serve.
Recipe from Good Food magazine, January 2018