Sam Jones left a while back, he went to Leicester and didn't fit in there and now hes at Blackburn
Tom Holland has left, he was on trial at Swansea at the end of last season. Trialled at Sunderland too
Samuelsen had a trial at West Ham in March and hasn't been seen since so I think hes left
Didn't hear anything of Hardy for a long time, hes been released though, had a trial at Sheffield United before the end of the season
Also, I think they don't appear on the retained list because their youth contracts finished in May I think