As I understand it he has not been charged with anything as the file is with the CPS. Currently police bail can only be for a maximum of 28 days so it will expire and he may be re-bailed repeatedly until a CPS decision. He may also be re-interviewed throughout the process until he has been "under arrest" for 24 hours in total.
I think there is now supposed to be a 6 month limit on the bail process before CPS HAS to make a decision, or apply to court for any further extension for their process. Not sure though as they have tried to change the process over recent years to make it "fairer" on anyone facing any allegations.