Harvey Davies and Leighton Clarkson, currently on loan at Blackburn Rovers, are part of the U20 squad for a fixture with Romania on September 6.
James Norris has been called up to the U19s for contests with Italy and Germany.
Meanwhile, Kaide Gordon, Oakley Cannonier, Lee Jonas and Luke Chambers are set to be with the U18 set-up when they face Wales.