I suppose squad numbers mean absolutely nothing nowadays, I seen Ronaldinho wearing 45 for Athletico Maneiro the other day and seen a few players in Serie A over the last couple of season's have 70 and 90 etc.
I personally would of given Colback 4, taken 10 off Wickham and give it to Sessegnon and taken 9 off Campbell for the arrival of Fletcher.
Still a few more players will leave and there numbers will be taken by the 5 or 6 new arrivals when they get here