As I understand it, without the correct licence, a manager can only act as a caretaker manager, and for a period of no longer than 12 weeks. Now, I'm very much open to correction on that.
How long was Foster managing for before he got his licence? Did he manage to get it before the 12-week period expired?
Going by the OP above, Kierans won't have finished the course within 12 weeks, as it says he'll have the licence by October.