Mix the starter, honey, and salt together. Stir, then allow the starter to start bubbling.
Rub your griddle and crumpet rings with oil, then place over a medium heat. It is very easy to burn the bottom of the crumpets if you're not careful, so be ready to adjust the temperature.
Stir the bicarb into the batter. It should start bubbling.
Once the rings are hot, spoon the batter into them, leaving a ½cm gap at the top to allow for rising.
When the edges are cooked, remove the crumpets from the rings and flip them over and cook for a further 3 minutes. Repeat the process with the remaining batter.