In the morning do the following:
Melt the butter (or whatever) and let it cool down. Clearly if you are using oil you don't need to melt it.
Beat the eggs with the milk (or water, or milk substitute)
Sieve together 140 g of the flour of your choice with the baking powder
Stir together the sugar and the salt
Uncover the bowl of refreshed starter and stir in the egg and milk (or whatever) mixture and the melted butter (or whatever).
Add the sugar and salt and stir. Add the sifted flour and baking powder mixture and whisk well to get rid of any lumps.
Let the batter sit for 30 minutes or so. Have a shower! Have a cup of coffee and read the paper! If you are desperate, don't bother letting it sit (but make sure there are no lumps).
Heat the frying pan to medium-high and add a little blob of butter or splash of oil.
Give the batter a little, last whisk and then use a jug or a ladle to pour the batter in the pan.
Scatter the fruit of your choice on top of the pancakes, if you want to and then flip them when there are bubbles all over the surface of the pancake and the edges are golden.
Cook for a good 2-3 minutes on the other side too or you will have fish belly pancakes (not a good look).
Keep the pancakes warm in the oven, under some aluminium foil as you cook all of them.
Serve with maple syrup or jam. Bacon is strictly optional.