Finely chop the prunes, then pour all the dried fruit and brewed Earl Grey tea into a medium-sized bowl. Mix until the fruit is coated in tea, then cover and set aside to soak while you make the bread dough. Stir it occasionally.
Stir together the milk, butter, and lard in a small saucepan over medium heat until the fats are fully melted. Make sure it doesn't get hotter than 115 F, or it may kill the yeast.
Crack the two eggs into the bowl of a stand mixer, then mix them with a whisk. Slowly pour the hot milk mixture into the eggs, whisking the whole time. Stir the salt, sugar, and spices into the mixture until well blended, then whisk in the yeast.
Put the bowl in the mixer and fit it with the paddle attachment. Turn the mixer on low speed and gradually add the flour until a smooth, somewhat sticky dough forms. You may not need all the flour, or you could need a little extra, depending upon the brand of flour you're using.
Switch the attachment to a dough hook and knead for 3-5 minutes on medium-low speed. Check to see if the dough is kneaded enough by using the windowpane test. Break off a lump of dough and stretch it between the thumb and forefinger of each hand to create a windowpane. If the dough is translucent in places without breaking, it has been kneaded enough. If not, knead for a minute longer and check again.
Shape the dough into a ball and place it in a buttered bowl. Cover with plastic wrap and set aside to prove in a warm place until at least doubled in size, about 2 hours.
Butter the base and sides of a 9x5-inch loaf pan.
Punch down the proved dough all over to knock out the gas pockets.
Stir the soaked dried fruit and drain off any excess liquid. Use the dough hook attachment of a stand mixer to incorporate the fruit into the dough on low speed. You'll need to add more flour, as the moisture form the fruit will make the dough very sticky. (You can also do this by hand on a floured work surface.)
Pat the dough into a 9-inch wide rectangle. Roll it up tightly from one of the short ends and place in the prepared loaf pan.
Cover with a sheet of plastic wrap and set aside to prove at room temperature until doubled in size, about 45 minutes to 1 hour.
Bake the loaf at 375°F for about 45 minutes. Cover the top with aluminum foil if it's getting too dark. The bread is done when it has an internal temperature of 190°F.
Allow the loaf to cool completely in the tin before slicing so it can finish cooking inside. Serve in thick slices with butter and Lincolnshire poacher cheese.