Why Britain and America did not keep the Littorios

Why did Britain and the United States give up the Littorio-class battleships they received as war prizes?

They did not want ships optimized for Mediterranean service and saw too little value in integrating them into their own postwar fleets.

The decision turns on suitability rather than a judgment that the Italian battleships were poor designs. The Littorios were useful in the Mediterranean setting for which they had been built. Britain and the United States nevertheless did not want them in their own postwar fleets. A good regional battleship was not automatically a useful war prize, although no detailed disposal or integration calculation is supplied.