Set the prover to 25℃ (77℉)1
Add the bread flour into the mixing bowl followed by sugar, salt and yeast in separate corners of the bowl so they are not touching. On a low-medium speed add eggs 1 at a time allowing it to completely incorporate before adding the next, followed by the milk. Turn the mixer up to a medium speed and knead for 4 minutes. Turn mixer down to medium-low speed and slowly feed in the butter until fully combined. Crank the mixer up to high and knead, 10-12 minutes.2
Lightly flour your work surface and turn the dough out. Pinch a corner of the dough, stretch outwards and fold over onto itself to the centre of the dough. Continue to do this working your way around the dough to form a rough ball. With your dough scraper scoop up the dough and turn over. Use the dough scraper to roll and tuck the dough to form a smooth and tight ball. Place into a lightly greased bowl and cover with cling film (or shower cap) then into the prover for 50 minutes - 1 hour until doubled in size. Once the dough has doubled in size, turn out the dough onto a lightly floured work surface and repeat the previous step to reshape the dough into a ball, cover the dough and into the fridge for 24 hours.3
Lightly grease the loaf tin. Remove the dough from the fridge and divide into 7 or 8 equal pieces. By cupping your hand, roll each piece into a smooth, tight ball. Place into the loaf tin, cover and into your prover for 2 hours. (The dough should rise to about 80% of the tin height)4 Preheat the oven to 160℃ (320℉). When the dough has risen, egg wash and into the oven for 30-35 minutes. If you tap the bread it should sound hollow.
Leave to cool in the loaf tin for 30 minutes or so before removing to cool on a wire rack for a couple of hours.