Heat up the oven to 160° (fan) and place a baking tray inside the oven
Mash the bananas in a large mixing bowl
Mix in the wet ingredients with the mashed bananas
Fold in the dry ingredients
Add in the blueberries and mix in until incorporated
Put a frying pan on a medium to high heat and melt a knob of butter
Spoon out the batter in to the pan and cook for about 5-10 minutes, flipping regularly until golden and cooked on both sides (you'll make about 8 pancakes)
Once you've finished frying the pancakes place them in the hot baking tray in the oven for another 5 minutes so they cook properly on the inside. You can stage this if you don't have enough space in your frying pan to cook all at once!