Place the flour in bowl of electric mixer. make a well in the centre and add the yeast and milk. Sprinkle over a little flour and wait a few minutes for bubbles to appear. This means you yeast is active. Start the mixer with the dough hook attached and slowly add the water and melted butter and combine. Add the salt and sugar. Keep mixing until the dough becomes very sticky. In dry weather you may need to add more water. Continue until the dough is very elastic. This could be up to 10 minutes of mixing. Place in an oiled bowl and cover with plastic wrap. Refrigerate overnight. It will double in size.