from the interview it sounded like... yes. he said he felt an obligation to the casts to keep working on the shows (i.e. if he left they'd be cancelled). dunno if he had to persuade the bbc to keep TW and SJA alive or he wouldn't be a happy welshman, or whether the bbc was like "pls stay! pls keep making SOMETHING for us, we'll even let you work on those two weird spinoff things if you want!"