The tournament begins on the 16th May and the squad is named on Thursday, Ledley says he is not sure of his prospects of taking part. He has already been ruled out of Saturday's visit to Leicester.
"Still a bit sore at the moment," Ledley said of his Achilles injury. "It definitely has got better but I can still feel it.
"I'm not really sure what's going to happen from here yet. The under-21s is a bit of a problem at the moment.
"We'll see how it goes.
"It would be nice to go, I've been on a under-21 trip before and enjoyed that and it'll be good to get involved again two years down the line and test myself."
Ledley King admits he is not sure of his chances of making England's impending under-21 European Championship trip to Switzerland.