That's an interesting possibility and presents a possible reason why Advent was set up separately, initially... in the unlikely case that DCVax isn't approved. In such a case Advent can continue its operations for other customers, being unburdened by any market repercussions on NWBO. Very smart on LP's part.
Therefore, upon approval, it could be a real possibility for NWBO to take over the Advent facility... unless LP wants manufacturing to remain separate for the potential franchise model.