Mix the flour, bicarbonate of soda, salt, and sugar in a bowl.
Combine the buttermilk, milk, eggs, and melted butter in a separate container.
Stir the wet mixture into the dry ingredients until just combined.
Melt a knob of butter in a large frying pan over medium heat.
Ladle batter into the pan and cook for one minute until bubbling.
Flip the pancakes and cook for one more minute until golden-brown.
Preheat the grill to a medium-hot temperature.
Brush bacon with maple syrup and grill until crisp on both sides.
Serve stacked pancakes topped with crisp bacon and maple syrup.