Mix the milk, yeast and sugar and set aside until frothy (about 10 minutes).
Mix and knead with the flour until a smooth dough forms, cover and leave to double in size (about 2 hours).
Once dropped down, mix in the water and bicarbonate of soda to form a batter and leave to double in size again for 30 minutes. (until the batter is filled with bubbles).
Whilst rising, set a griddle or cast-iron skillet on low heat until it is hot enough that a drop of water sizzles on it.
Lightly oil the skillet, place lightly oiled crumpet rings on it and let them heat for a moment.
Spoon in enough batter to half fill the rings.
Cook until the bottoms are lightly browned and the tops are set.
Remove the rings, turn over and cook until the tops are lightly browned.
Remove and set on a wire rack to cool.
Toast before serving and generously spread with butter.
*** If you do not have muffin rings, cook drops of the batter as for small breakfast pancakes. You now have “Pikelets”