Sift the flours into a large mixing bowl adding half a teaspoon of the bicarbonate of soda and the salt.
Crumble the yeast into a small bowl and slowly add the water until you have a brown paste.
Pour the liquid yeast into the mixing bowl.
Mix it about a bit until you have a very thick batter. You can use a wooden spoon, but you get much better results if you get stuck in and use your hands.
Cover the bowl with a warm and damp cloth and leave in a warm place for two hours. I like to bake this after I have had my dinner so I usually put it into the oven. If you do the same make sure the oven is not too hot before you do this as not only will the mixture start cooking, but you could melt a plastic mixing bowl.
Return to the now frothy batter (if it is not then you have done something wrong). Dissolve the rest of the Bicarbonate of soda in the lukewarm milk and slowly add it to the batter.
Heat either a lightly greased griddle or an ordinary frying pan and oil until it is very hot. Now with a spoonful at time cook the mixture for about two minutes on each side. The indication to turn should be when the bubbles that will form dry out.