Questions I would have asked:
1. Why have you not released the CCTV you have of Nicola? Or can you just confirm for the record that - aside from her own Ring doorbell footage - there is no CCTV of NB on the morning she disappeared?
2. You said there is no evidence of third party involvement or criminality. There is also no evidence of her entering the river, correct? Just to clarify then, what specifically has caused you to speculate that it is more likely she is in the river than chose to leave the area for any number of reasons?
3. I understand that you would not want to reveal specific personal vulnerabilities, but why did you leave it 3 weeks to reveal that NB was high-risk? Wouldn't have doing so increased useful public involvement in those critical early days whilst dampening unhelpful speculuation? Do you regret not releasing this information sooner?